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What is Computer – Characteristics, Definition, Functions, Types and Uses 2023

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A computer is an electronic device that can perform a wide range of tasks, including storing, retrieving, and processing data, as well as executing instructions (programs) to solve problems and accomplish specific tasks. It can also connect to other devices and networks to exchange information.

Computers come in many forms, including desktop computers, laptops, tablets, and smartphones. They use a variety of technologies and components, such as processors, memory, storage, and input/output devices, to perform their tasks.

They can run various operating systems, such as Windows, macOS, Linux, and iOS, and can be used for a wide range of purposes, including personal and professional use, gaming, entertainment, and communication. Additionally, computers are now being used in various fields including medical, education, research, business and many more. They are also used in artificial intelligence and machine learning.

Let us know about the computer in detail.

What is Computer

A computer is a machine that can accept and process data according to a set of instructions, called a program. A computer can perform a wide range of tasks, such as data processing, analysis, and communication. The basic components of a computer include a central processing unit (CPU), memory, storage, and input/output devices.

The CPU is the “brain” of the computer, responsible for executing instructions & performing calculations. Memory temporarily stores data that the CPU uses, while storage, such as a hard drive or SSD, holds longer-term data and programs. Input devices, such as a keyboard and mouse, allow the user to interact with the computer, while output devices, such as a monitor or printer, display or print the results of the computer’s processing.

How does computer work?

A computer works by receiving input, processing it, and producing output. The input is typically entered through an input device, such as a keyboard or mouse. This input is then sent to the central processing unit (CPU), which is the “brain” of the computer. The CPU retrieves instructions from memory and executes them, performing calculations and logical operations as directed by the program.

Data and instructions are stored in memory and storage devices, such as RAM and hard drive. The CPU accesses the memory and storage as needed to execute the instructions and perform calculations. The results of these operations are then sent to output devices, such as a monitor or printer, to be displayed or printed.

The computer also uses an Operating System (OS) to manage the resources of the computer, such as CPU, Memory, and input/output devices and to provide services such as file management, security, and networking.

The CPU uses a clock to synchronize the operations and the memory is used to temporarily store data and instructions used by the CPU. The storage devices like hard disk or SSD are used to store programs and data. All these components work together to execute instructions, perform calculations, and produce the desired output.

What is the full form of computer?

The full form of the word “computer” is not an acronym, and therefore does not have a specific full form. The word “computer” is derived from the Latin wordcomputare“, which means “to calculate” or “to compute“.

C – Commonly
O – Operated
M – Machine
P – Particularly
U – Used for
T – Technical and
E – Educational
R – Research

However, some people have used the acronym “Common Operating Machine Purposely Used for Technological and Educational Research” to describe the word “computer” or “Common Operating Machine Particularly Used for Trade, Education, and Research”

But it’s not an official or a widely accepted full form, it’s just a way to remember the word “computer” and it’s purpose.

features of Computer

Computers have many features that make them powerful and versatile tools for a wide range of tasks. Some of the most important features of a computer include:

  1. Processing power: The central processing unit (CPU) of a computer is responsible for executing instructions and performing calculations. The faster the CPU, the more powerful the computer is.
  2. Memory: Memory, such as random access memory (RAM), temporarily stores data that the CPU uses. The more memory a computer has, the more data it can process at one time.
  3. Storage: Storage devices, such as hard drives or solid-state drives (SSDs), hold longer-term data and programs. The more storage a computer has, the more data it can hold.
  4. Input/output devices: Computers use a variety of input devices, such as a keyboard and mouse, to receive input from the user. Output devices, such as a monitor or printer, display or print the results of the computer’s processing.
  5. Connectivity: Many computers have built-in connectivity options, such as Ethernet and Wi-Fi, that allow them to connect to other devices and networks.
  6. Multitasking: Multitasking is the ability of a computer or an operating system to perform multiple tasks simultaneously. This allows a user to run multiple programs at the same time, switch between them, and have them all running in the background without interruption.
  7. Portability: Laptops and tablets have become increasingly popular due to their portability, allowing users to take their computer with them wherever they go.
  8. Operating System: A computer’s operating system, such as Windows, MacOS, or Linux, manages the resources of the computer and provides services such as file management, security, and networking.
  9. Software support: The ability to run a variety of software programs, such as productivity tools, games, and multimedia applications, on the computer.
  10. User-friendly interface: Many computers have a user-friendly interface, such as a graphical user interface (GUI), that makes them easy to use for people with little or no technical background.

How to run computer?

To run a computer, you will first need to make sure that it is properly set up and connected to all necessary peripherals, such as a monitor, keyboard, and mouse. Once your computer is set up and connected, follow these steps to turn it on and begin using it:

  1. Press the power button: This is typically located on the front or back of the computer tower, or on the side of a laptop.
  2. Wait for the computer to boot up: This may take a few minutes. You will see the computer’s logo and progress bar while it starts up.
  3. Log in: Once the computer has booted up, you will be prompted to log in. Enter your username and password to access your account.
  4. Start using your computer: Once you are logged in, you can begin using your computer. You can open programs, browse the internet, and perform a variety of other tasks.
  5. To shut down the computer, you can click on the start button or the icon of the operating system and select shut down or you can press Alt + F4 and choose shut down from the options.

It’s important to keep in mind that different computers may have slightly different steps or procedures for starting up, so refer to the user manual or contact the manufacturer if you have any questions.

Who invented computer?

The concept of a computer has been around for centuries, with various people and machines contributing to its development. However, the first electronic computer, called the Electronic Numerical Integrator And Computer (ENIAC), was developed during World War II by John W. Mauchly and J. Presper Eckert, two American engineers. The ENIAC was a large, room-sized machine that was used to calculate artillery firing tables for the United States Army. It was completed in 1945 and was considered to be the first general-purpose electronic computer.

Before the invention of ENIAC, Charles Babbage in 1822, had a design for a machine he called the “Analytical Engine,” that could perform mathematical operations using punch cards. Ada Lovelace, considered the first computer programmer, wrote the first algorithm to be processed by Babbage’s machine.

However, ENIAC was not a practical machine for general use, it was large, expensive, and not programmable, it was only used for specific tasks. The first practical and programmable computers were developed in the late 1940s and early 1950s by other scientists and engineers such as John von Neumann and Alan Turing.

It’s important to note that the development of the computer has been a cumulative process, with contributions from many individuals, organizations, and cultures over time.

Definition of Computer

A computer is a machine or device that can accept data, process it according to a set of instructions, and produce output. It is an electronic device that can accept input, store, process, and output data or information. A computer can perform a wide range of tasks, from simple calculations to complex simulations, and it can be used for a variety of purposes,

such as data processing, analysis, communication, and entertainment. Computers are composed of hardware and software, where hardware refers to the physical components of the computer and software refers to the programs and instructions that control the operations of the computer.

what is the function of computer

Computers can perform a wide range of functions, depending on the software and hardware that is installed on them. Some of the most common functions of a computer include:

  1. Data Processing: This is one of the most basic and essential functions of a computer. It allows the user to input, store, process and retrieve data using various software applications.
  2. Communication: Computers can be used for communication through email, instant messaging, and video conferencing.
  3. Internet Access: Computers can be used to access the internet, browse web pages, and use online services such as social media, online banking, and e-commerce.
  4. Media and Entertainment: Computers can be used to play music, watch videos, and play games. They can also be used to create and edit multimedia content such as videos and images.
  5. Productivity: Computers can be used to create and edit documents, spreadsheets, and presentations using software such as Microsoft Office or Google Docs.
  6. Analysis and Simulation: Computers can be used to perform complex analysis and simulations in fields such as science, engineering, and finance.
  7. Automation: Computers can be used to automate repetitive tasks, such as data entry and scheduling, using software such as macros and scripts.
  8. Artificial Intelligence: computers can be used to perform tasks that would normally require human intelligence such as speech recognition, decision making, and learning.
  9. Gaming: Computers are also a popular platform for gaming and can run a wide variety of games from simple 2D games to high-end 3D games.

The function of a computer is to process and manipulate data using a set of instructions, in order to provide information and automate tasks.

Main Parts of Computer

 

The main parts of a computer include the following:

  1. Central Processing Unit (CPU): The CPU, also known as the “brain” of the computer, is responsible for executing instructions and performing calculations. It is the most important part of the computer and determines the overall performance of the system.
  2. Memory (RAM): Memory, also known as Random Access Memory (RAM), temporarily stores data that the CPU uses. The more memory a computer has, the more data it can process at one time.
  3. Storage: Storage devices, such as hard drives or solid-state drives (SSDs), hold longer-term data and programs. The more storage a computer has, the more data it can hold.
  4. Motherboard: The motherboard is the main circuit board in a computer. It connects the various parts of the computer together and allows them to communicate with each other.
  5. Power Supply: The power supply unit (PSU) converts alternating current (AC) from the wall outlet into direct current (DC) that the computer can use.
  6. Input/Output Devices: Input devices, such as a keyboard and mouse, allow the user to interact with the computer. Output devices, such as a monitor or printer, display or print the results of the computer’s processing.
  7. Cooling system: The cooling system, usually a fan or a liquid cooling system, keeps the computer from overheating.
  8. Expansion cards: Expansion cards, such as a graphics card, network card, or sound card, can be added to the motherboard to expand the computer’s capabilities.
  9. Peripherals: Other devices that can be connected to a computer include a printer, scanner, camera, and external hard drive.

These are the main parts of a computer, but there are other components that can be added or changed as well. It’s important to note that different types of computers, such as laptops, tablets, and servers, may have different components or configurations.

Motherboard

A motherboard is the main circuit board in a computer. It connects all of the different parts of the computer together and allows them to communicate with each other. The motherboard contains the sockets for the central processing unit (CPU), memory (RAM), and storage (hard drive or solid-state drive (SSD), as well as the connectors for input/output devices and expansion cards.

It also includes the chipset which controls the communication between the CPU, memory, storage, and the other components, the BIOS which stores the basic input/output system and provides an interface between the operating system and the hardware, and the power connectors that provide power to the various components of the computer.

The size and layout of a motherboard can vary depending on the type of computer it is designed for. A desktop motherboard is typically larger than a laptop motherboard, and a server motherboard is designed to support multiple CPUs and large amounts of memory.

The motherboard is one of the most important parts of a computer, as it determines the overall performance of the system and the types of components that can be added or upgraded.

When building or upgrading a computer, it’s important to ensure that the motherboard is compatible with the other components, such as the CPU, memory, and storage, and that it has the necessary features and connectors for the desired use of the computer.

CPU

The Central Processing Unit (CPU) is the “brain” of the computer, responsible for executing instructions and performing calculations. It is the most important part of the computer and determines the overall performance of the system. The CPU retrieves instructions from memory, decodes them, and performs the operations specified by the instructions.

A CPU is made up of one or more cores, which are the actual processors that execute the instructions. The number of cores and the clock speed of the CPU determine the processing power of the computer.

The clock speed is measured in GHz (gigahertz) and it indicates how many cycles per second the CPU can perform. The more cores and the higher the clock speed, the more powerful the CPU is.

The CPU also includes a cache, which is a small amount of fast memory that the CPU uses to store frequently accessed data. This allows the CPU to quickly access the data it needs without having to retrieve it from main memory, which can be slower.

There are several different types of CPUs available, such as Intel and AMD, and they are constantly evolving to become faster and more efficient.

The CPU is the “brain” of the computer, responsible for executing instructions and performing calculations. It’s the most important part of the computer and it determines the overall performance of the system. It’s responsible for fetching instructions from memory, decoding them, and performing the operations specified by the instructions. The number of cores and the clock speed of the CPU are the key factors that determine the processing power of the computer.

RAM

Random Access Memory (RAM) is a type of computer memory that temporarily stores data that the central processing unit (CPU) uses. It is a form of volatile memory, meaning that the data stored in it is lost when the computer is powered off.

RAM allows the CPU to access the data it needs quickly, without having to retrieve it from storage devices such as a hard drive, which can be slower. The more RAM a computer has, the more data it can process at one time, and the faster the computer will be able to perform tasks.

RAM comes in different types and capacities, such as DDR3 and DDR4, and it’s measured in GB (gigabytes). The amount of RAM that a computer needs depends on the type of tasks it will be performing and the number of programs that will be running at the same time.

Generally, the more RAM a computer has, the better it will be able to handle multitasking and running multiple programs at the same time.

When building or upgrading a computer, it’s important to ensure that the motherboard has enough RAM slots and that you are using compatible RAM with the motherboard. It’s also important to note that different types of computers, such as laptops, tablets, and servers, may have different types and capacities of RAM.

Storage

Storage is a term used to describe the devices or media that a computer uses to store data and programs. The two main types of storage are primary storage and secondary storage.

Primary storage, also known as memory, refers to the memory that the computer uses to temporarily store data that the CPU uses. This includes random access memory (RAM) and cache memory. This type of storage is fast but volatile, meaning that the data is lost when the computer is powered off.

Secondary storage, on the other hand, refers to the storage devices that a computer uses to store data and programs permanently. This includes hard drives and solid-state drives (SSDs). This type of storage is slower than primary storage, but it retains data even when the computer is powered off.

The 2 most common types of secondary storage are:

  • Hard Disk Drives (HDD) : They are traditional storage devices that use magnetic disks to store data. They are relatively inexpensive, but they can be slower and less durable than other storage options.
  • Solid-State Drives (SSD) : They are newer storage devices that use flash memory to store data. They are faster and more durable than HDDs, but they are also more expensive.

When building or upgrading a computer, it’s important to consider the capacity of the storage device, the type of storage device, and the speed of the storage device.

The capacity of the storage device is measured in GB (gigabytes) or TB (terabytes) and it determines how much data can be stored on the device. The type of storage device is also important and it depends on the application and budget.

Storage refers to the devices or media that a computer uses to store data and programs. The two main types of storage are primary storage, which is used to temporarily store data that the CPU uses, and secondary storage, which is used to store data and programs permanently. Popular secondary storage devices include hardware.

Power Supply

The Power Supply Unit (PSU) is a critical component of a computer that provides power to the various parts of the system, such as the central processing unit (CPU), memory (RAM), storage, and expansion cards. It converts the alternating current (AC) from a wall outlet into direct current (DC) that the computer components can use.

A PSU is typically located inside the computer’s case and is connected to the motherboard and other components through a series of cables and connectors. The PSU also provides power to the cooling system, such as fans, to keep the computer from overheating.

Power supply units come in different sizes and power ratings, measured in watts. The power rating indicates the maximum amount of power that the PSU can provide. The amount of power required depends on the components of the computer, such as the number and type of expansion cards, the number of storage devices and the CPU. A general guideline is that the PSU should have at least 20% more power than the estimated power consumption of the components.

When building or upgrading a computer, it’s important to ensure that the PSU has enough power to support all of the components, has the necessary connectors for the components you are using and it’s of good quality. A poor quality PSU can cause stability issues and even damage to the components.

Input/Output Devices

Input/Output (I/O) devices are the hardware components that a computer uses to communicate with the outside world. They allow a user to input data into the computer, and to receive output from the computer.

Input devices are hardware components that allow users to input data into the computer, such as:

  • Keyboard: Allows users to input text and commands
  • Mouse: Allows users to point, click, and select items on the screen
  • Scanner: Allows users to input printed or written documents into the computer as digital images
  • Touchpad: Allows users to point, click and select items on the screen as an alternative to a mouse.
  • Microphone: Allows users to input audio into the computer.

Output devices are hardware components that allow the computer to output data to the user, such as:

  • Monitor: Allows users to view text and images on the screen
  • Printer: Allows users to print documents and images
  • Speakers: Allows users to hear audio from the computer
  • Headphones: Allows users to listen to audio from the computer privately
  • Projectors: Allows users to project images and videos on a large screen.

I/O devices can be internal, such as a keyboard or a hard drive, or external, such as a printer or a monitor, and they can be connected to the computer through various interfaces, such as USB, HDMI, or Ethernet.

Input/Output (I/O) devices are the hardware components that a computer uses to communicate with the outside world. Input devices allow users to input data into the computer, and Output devices allow the computer to output data to the user. These devices include keyboard, mouse, scanner, touchpad, microphone, monitor, printer, speakers, headphones, and projectors. Some of these devices can be internal or external and they can be connected to the computer through various interfaces.

Cooling system

A cooling system is a system of hardware and software components that are designed to keep a computer from overheating. It is an important part of a computer as overheating can cause damage to the components, reduce the performance and stability of the computer, and even lead to system failure.

There are 2 main types of cooling systems: Active and Passive.

Active cooling systems use fans or other mechanical means to dissipate heat away from the components. These systems can be found in desktop computers and servers. The fans work by blowing cool air over the hot components and expelling the warm air out of the computer. The CPU and GPU are typically equipped with heatsinks which are designed to increase the surface area for the heat to dissipate, this is often combined with fans to increase the cooling effect.

Passive cooling systems rely on natural convection to dissipate heat away from the components. These systems can be found in laptops, tablets, and other portable devices. They use heatsinks and other heat-dissipating materials to draw heat away from the components, but they do not have fans or other mechanical means to move heat away from the device.

It’s important to note that the cooling system is not a standalone component, it is integrated into the overall design of the computer and it works in conjunction with other components such as the power supply and the case. When building or upgrading a computer, it’s important to ensure that the cooling system is adequate for the components and the intended use of the computer.

Expansion cards

Expansion cards are hardware components that can be added to a computer to expand its capabilities. They plug into expansion slots on the motherboard and connect to the computer’s bus, which allows them to communicate with the CPU and other components.

Some common types of expansion cards include:

  • Graphics card: A graphics card, also known as a video card, is used to process and display images on the monitor. It is typically used for gaming, video editing, and other graphics-intensive tasks.
  • Sound card: A sound card is used to improve the audio capabilities of a computer. It allows the computer to output high-quality audio, and can also be used to input audio from external sources, such as a microphone.
  • Network card: A network card, also known as a NIC (Network Interface Card), is used to connect the computer to a network. It allows the computer to communicate with other devices on the network and access the internet.
  • TV Tuner card: A TV Tuner card is a type of expansion card that allows the computer to receive and decode television signals. It allows the user to watch TV and record TV shows on the computer.
  • FireWire card: A FireWire card is a type of expansion card that allows the computer to connect to FireWire devices, such as cameras and external hard drives.

When building or upgrading a computer, it’s important to ensure that the motherboard has enough expansion slots and that the expansion cards are compatible with the motherboard and the rest of the components.

Expansion cards are hardware components that can be added to a computer to expand its capabilities. They plug into expansion slots on the motherboard and connect to the computer’s bus. Common types of expansion cards include graphics card, sound card, network card, TV Tuner card and FireWire card.

They allow the computer to perform more specific tasks and enhance the capabilities of the computer. It’s important to ensure that the motherboard has enough expansion slots and that the expansion cards are compatible with the motherboard and the rest of the components.

Peripherals

Peripherals are devices that can be connected to a computer to expand its capabilities or to improve the user’s experience. They are not essential for the basic functioning of the computer, but they can add functionality and convenience. Some common types of peripherals include:

  • Printer: Allows users to print documents and images
  • Scanner: Allows users to input printed or written documents into the computer as digital images
  • External hard drive: Allows users to store additional data and programs
  • Webcam: Allows users to take pictures and videos and make video calls
  • Joystick: Allows users to play games with more control
  • Gamepad: Allows users to play games with a more traditional controller
  • Microphone: Allows users to input audio into the computer
  • Headphones: Allows users to listen to audio from the computer privately

Peripherals can be connected to the computer through various interfaces, such as USB, HDMI, or Ethernet. Some peripherals, such as printers and external hard drives, can also be connected wirelessly.

Peripherals are devices that can be connected to a computer to expand its capabilities or to improve the user’s experience. They are not essential for the basic functioning of the computer. Some common types of peripherals include printers, scanners, external hard drives, webcams, joystick, gamepad, microphone and headphones. They can be connected to the computer through various interfaces and some can be connected wirelessly.

computer hardware and software

Computer hardware refers to the physical components of a computer system, such as the central processing unit (CPU), memory (RAM), storage, and input/output devices. These are the tangible components of the computer that can be seen and touched.

Computer software, on the other hand, refers to the instructions and programs that a computer uses to perform tasks. Software is a set of instructions that tell the computer what to do. It is the intangible component of a computer, as it cannot be seen or touched.

There are two main types of software:

  • System software: This type of software is responsible for managing and coordinating the activities and sharing of resources of the computer. Examples include the operating system (OS), device drivers and utilities.
  • Application software: This type of software is designed to perform specific tasks for the user. Examples include word processors, spreadsheet programs, and games.

Hardware and software work together to make a computer function properly. The hardware provides the physical components for the computer to operate, while the software provides the instructions for the hardware to execute. Without the software, the hardware would not know what to do. Without the hardware, the software would not have anything to run on.

Type of Computer

There are many different types of computers available, each designed for a specific purpose or use case. Some common types include:

  • Desktop computers: These are the most common type of computers and are designed for use in a fixed location, such as an office or home. They are typically larger in size and have more powerful components than other types of computers.
  • Laptop computers: These computers are designed for portability and are smaller in size than desktop computers. They are equipped with a battery and can be used on the go.
  • Tablet computers: These are portable computers that are designed to be primarily operated by touching the screen. They are lightweight and have a long battery life.
  • Server computers: These computers are designed to manage and store large amounts of data, and to support multiple users and devices. They are typically more powerful and have more storage capacity than other types of computers.
  • Gaming computers: These computers are specifically designed for gaming and have high-performance components and graphics cards. They are typically more expensive than other types of computers.
  • Workstations: These computers are designed for professional use and are used for tasks such as graphic design, video editing, and scientific research. They are typically more powerful than other types of computers and have specialized components.
  • Thin clients: These computers are designed to be simple and low-cost. They are used primarily to access a remote server, where the processing is done.
  • Supercomputers: These are the most powerful type of computers.

Computer Access

Computer access refers to the ability to use a computer and its resources, such as software, data, and devices.

There are different ways to access a computer, including:

  • Physical access: This refers to the ability to physically interact with the computer, such as turning it on and off, inserting and removing storage devices, and connecting and disconnecting peripherals.
  • Remote access: This refers to the ability to access a computer from a remote location, such as over the internet or a network. Remote access can be done through remote desktop software, virtual private network (VPN) connections, or cloud-based services.
  • User access: This refers to the ability to access the computer’s resources, such as software and data, based on the user’s identity and permissions. Users may have different levels of access, such as administrator, guest, or read-only.
  • Network access: This refers to the ability to access the computer and its resources over a network, such as a local area network (LAN) or wide area network (WAN). Network access can be controlled through network security protocols, such as firewalls, and through the use of network access control (NAC) systems.
  • Mobile access: This refers to the ability to access the computer or its resources through a mobile device, such as a smartphone or tablet. This can be done through mobile apps or mobile browser access.
  • Cloud access: This refers to the ability to access the computer or its resources through the cloud, which means accessing data, software and services over the internet. This can be done through cloud-based services such as Microsoft Azure, AWS, or GCP.

Computer access refers to the ability to use a computer and its resources, such as software, data, and devices. There are different ways to access a computer, including physical access, remote access, user access, network access, mobile access and cloud access. Each of these access methods have their own unique characteristics and security concerns.

Future of Computer

The future of computers is an ever-evolving field with new advancements and technologies being developed all the time. Some areas where computers are expected to see significant growth and advancements in the future include:

  • Artificial intelligence (AI) and machine learning (ML): AI and ML are expected to become more advanced and integrated into everyday life, with computers becoming better at tasks such as natural language processing, image recognition, and decision-making.
  • Quantum computing: Quantum computing is a new and developing field that uses the principles of quantum mechanics to perform calculations. It has the potential to revolutionize the way computers process and store data, making them significantly faster and more powerful.
  • Cloud computing: Cloud computing is expected to continue to grow in popularity, as more and more businesses and individuals rely on the cloud for data storage and processing.
  • Internet of Things (IoT): The number of connected devices is expected to continue to grow, with more and more devices becoming connected to the internet. This will lead to the development of new applications and services that take advantage of this connectivity.
  • 5G and edge computing: The rollout of 5G networks is expected to lead to faster and more reliable internet connections, which will enable new applications such as virtual and augmented reality, and enable edge computing, which allows for processing data closer to the source, reducing latency and improving efficiency.
  • Robotics and automation: Robotics and automation are expected to become more advanced, with robots and autonomous systems becoming more capable and integrated into society.
  • Biotechnology: Biotechnology is being integrated into computer systems and making them more human-like, with the ability to perceive, reason, and act on the environment.

What did you learn today?

I have told everything about computer. What is a computer? What is the work of computer? Explained about the business of computer.So what is this computer? How did you like the blog, do write in the comment and if there is a mistake somewhere, then let me know, 🙏

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