Computer is an electronic devices that performs four basic operations: input, processing, output and storage.
Categories of computer:
A) Super computer
- Fastest, most powerful, most expensive computer, used foe very complex,suphostificated job.
- Physical size: Full room of equipment
- Speed: Capable to processing billions of program instructions per second
- Storage: More than 20,000 times the data and information of an average desktop computer
- Large, expensive, powerful computer
- Physical size: Partial room to a full room of equipment
- Speed: Handle hundreds or thousands of connected users simultaneously at the same time
- Storage: Can store tremendous amounts of data, instructions, and information
C) Personal computer- Computer that can perform all its input, processing, output and storage activities by itself
- Physical size: Fits on a desk
- Speed: Depends on the memory and processors
- Storage: Depends on the hard drive size
D) Mobile computer and devices- Physical size: Fits on the lap, palm, pocket
- Speed: May slower than a personal computer
- Storage: Small storage media
- Special-purpose computer, functions as a component in a larger product, perform various functions depending on the product.
- Physical size: Small
- Speed: May slower than a mobile computer and devices.
- Storage: Limited or small storage media.
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