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- Computer - A device that can follow instructions stored in its memory. Computer system - A combination of hardware and software that can be programmed to perform a variety of tasks.
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What is a computer system?
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A computer is a device for working with information. The information can be numbers, words, pictures, movies, or sounds. Computer information is also called data. Computers can process huge amounts of data very quickly. They also store and display data.
- Characteristics
- Hardware
- Controls
- Programs
- History of Computers
- Kinds of Computers
- Common Uses of Home Computers
- Common Uses of Computers at Work
- Working Methods
- Networking and The Internet
Сomputers can respond to a specific instruction setin a well-defined manner and they can execute a prerecorded list of instructions called a program. There are four main processing steps in a computer: inputting, storage, outputtingand processing. Modern computers can do billions of calculations in a second. Being able to calculate many times per s...
Modern computers are electronic computer hardware. They do mathematical arithmetic very quickly but computers do not really "think". They only follow the instructions in their software programs. The softwareuses the hardware when the user gives it instructions, and gives useful output.
Humans control computers with user interfaces. Input devices include keyboards, computer mice, buttons, and touch screens. Some computers can also be controlled with voice commands, hand gestures or even brain signals through electrodes implanted in the brain or along nerves.
Computer programs are designed or written by computer programmers. A few programmers write programs in the computer's own language called machine code. Most programs are written using a programming language like C, C++, Java. These programming languages are more like the language with which one talks and writes every day. The compilertranslates the...
Automation
Most humans have a problem with math. Try doing this 584 × 3,220in your head. It is hard to remember all the steps! People made tools to help them remember where they were in a math problem. The other problem people have is that they have to do the same problem over and over and over again. A cashier had to work out what the change was every day in her head or with a piece of paper. That took a lot of time and made mistakes. So, people made calculatorsthat did those same things over and over....
Programming
People do not want a machine that would do the same thing over and over again. For example, a music box is a machine that plays the same music over and over again. Some people wanted to be able to tell their machine to do different things. For example, they wanted to tell the music box to play different music every time. They wanted to be able to program the music box- to order the music box to play different music. This part of computer history is called the "history of programmable machines...
The computing era
At the end of the Middle Ages, people started thinking math and engineering were more important. In 1623, Wilhelm Schickard made a mechanical calculator. Other Europeans made more calculators after him. They were not modern computers because they could only add, subtract, and multiply- you could not change what they did to make them do something like play Tetris. Because of this, we say they were not programmable. Now engineers use computers to design and plan. In 1801, Joseph Marie Jacquard...
There are many types of computers. Some include: 1. personal computer 2. workstation 3. mainframe 4. server 5. minicomputer 6. supercomputer 7. embedded system 8. tablet computer A "desktop computer" is a small machine that has a screen (which is not part of the computer). Most people keep them on top of a desk, which is why they are called "deskto...
Playing computer gamesSolving math problemsWatching videosComputers store data and the instructions as numbers, because computers can do things with numbers very quickly. These data are stored as binary symbols (1s and 0s). A 1 or a 0 symbol stored by a computer is called a bit, which comes from the words binary digit. Computers can use many bits together to represent instructions and the data that these ...
Computers have been used to coordinate information between multiple locations since the 1950s. The U.S. military's SAGE system was the first large-scale example of such a system, which led to a number of special-purpose commercial systems such as Sabre. In the 1970s, computer engineers at research institutions throughout the United States began to ...
This tutorial on what Is a computer system defines the computer system in a simple language. Simple terms are used to make it easy for a kid to understand an...
- 3 min
- 815
- Kmacims Education Annex
In its most basic form, a computer system is a programmable electronic device that can accept input; store data; and retrieve, process and output information.
All computers, no matter how they are programmed, work with inputs, processes, and outputs. We will explain IPO within the context of a self-contained, programmable device, which most people would understand to be something like a desktop computer, laptop computer, tablet, or smartphone.
A computer is an electronic device that manipulates information, or data. It has the ability to store, retrieve, and process data. You may already know that you can use a computer to type documents, send email, play games, and browse the Web.
