What is a Computer?
A computer is a programmable machine. The two principal characteristics of a computer are: it responds to a specific set of instructions in a well-defined manner and it can execute a prerecorded list of instructions (a program).
Modern Computers Defined
Modern computers are electronic and digital. The actual machinery -- wires, transistors, and circuits -- is called hardware; the instructions and data are called software.
All general-purpose computers require the following hardware components:
In addition to these components, many others make it possible for the basic components to work together efficiently. For example, every computer requires a bus that transmits data from one part of the computer to another.
Computer Classification, By Size and Power
Computers can be generally classified by size and power as follows, though there is considerable overlap:
Top 5 Computer Related Questions
1. What is computer history?
2. What is computer hardware?
3. What is computer software?
4. What is computer science?
5. What is computer interface?
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