The document classifies computers based on size and shape as microcomputers, mini-computers, mainframe computers and super computers. It also classifies them based on data representation as analog computers, digital computers and hybrid computers. The key differences between analog and digital computers are that analog computers output voltage signals while digital computers output numbers, and digital computers have simpler data storage due to their numeric nature.

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2. Classification of Computers
Introduction
Computers can be classified on the following bases.
1. SHAPE AND SIZE 2. DATA REPRESENTATION

3. Classification on the bases of Size and shape
On the bases of size and shape,
computer have the following types.
Micro-
computers
Mini-computers
Mainframe-
computers
Super-
computers
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4. Classification on the bases of Data representation
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On the bases of data representation,
computers are classified into following
types.
Analog
Computers
Digital
Computers
Hybrid
Computers

5. Comparison of Analog and Digital Computers
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6. Differences
Analog computers
Analog computers output voltage
signals
Analog computers circuits use op
amps, signal generators and networks
of resistors and capacitors.
For analog computers, storing data is
more difficult
Digital Computers
Digital computers produce numbers
as output.
Digital computers use a variety of on-
off switching circuits, such as
microprocessors, clock pulse
generators and logic gates.
The numeric, discrete nature of digital
computers makes data storage simple
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7. Mainframes Super-computers Mini-computers
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A smartphone is a handheld personal computer with a mobile operating system and an
integrated mobile broadband cellular network connection for voice and data communication.

9. Comparison of two
Softwares
Features Software 1 Software 2
Ease of Use
Stability
New features
Cost
Compatibility
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Include this
Specification
Not include
this
specification

10. Parts of PC
Personal computers have following parts.
• Central Processing Unit
• Monitor
• Key-board
• Mouse
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