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Introduction to Computers
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An introduction to computers, explaining what they are, what they do, and their uses. It covers the four general operations of computers, the importance of data and information, and various types of computers such as microcomputers, minicomputers, mainframes, and supercomputers. The document also discusses the history of computers and their applications in different areas.
Typology: Schemes and Mind Maps
2018/2019
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Introduction to Computers
What Is A Computer?
A computer is an electronic device, operating under the control of instructions (software) stored in its own memory unit, that can accept data (input), manipulate data (process), and produce information (output) from the processing. Generally, the term is used to describe a collection of devices that function together as a system.
What Does A Computer
Do?
Computers can perform four general operations, which comprise the information processing cycle. Input Process Output Storage
What Do Computers
Do?
Input, Process, Output, & Store data
Input Process Output
Store Data
Why Is A Computer So Powerful? The ability to perform the information processing cycle with amazing speed. Reliability (low failure rate). Accuracy. Ability to store huge amounts of data and information. Ability to communicate with other computers.
How Does a Computer
Know what to do?
It must be given a detailed list of
instructions, called a compute program or
software , that tells it exactly what to do.
Before processing a specific job, the
computer program corresponding to that job
must be stored in memory.
Once the program is stored in memory the
compute can start the operation by
executing the program instructions one after
the other.
Uses of Computer
PC at Home Common uses for the computer within the home Computer games Working from Home Banking from Home Connecting to the Web
Uses of Computer
Office Applications Stock Control Stock control is ideal for automation and in many companies it is now completely computerized. The stock control system keeps track of the number of items in stock and can automatically order replacement items when required. Accounts / Payroll In most large organizations the accounts are maintained by a computerized system. Due to the repetitive nature of accounts a computer system is ideally suited to this task and accuracy is guaranteed.
Uses of Computer
Computers in Daily Life Accounts Games Educational On-line banking Smart ID cards Supermarkets Working from home (Tele-working) Internet