This document classifies different types of digital computers. It discusses microcomputers like PCs, laptops, and PDAs. It also covers mini computers, mainframe computers, network computers, and supercomputers. Microcomputers are the most commonly used personal computers for individual work. Mini computers are mid-sized and used in organizations. Mainframe computers are the largest and process huge amounts of data for banks and other large businesses. Supercomputers provide extremely fast processing for specialized applications like weather forecasting.

1. Classification of
Digital Computers

2. Network
Computers
Portable
Computers
Super
computers
Digital
computers
Micro
Computers
Mini
Computers
Mainframes
computers
Personal
Computers

3. Micro Computers
 Microcomputer is also called Personal
Computer.
 Introduced by IBM commercially called
IBM PC.
 CPU created on a single chip.
 Effective for individual work.

4. Types of Micro Computers
 Workstations
 Desktops
 Servers
 Laptops
 Notebooks

5. Personal Computers
• PCs are desktop or portable machines.
• Easy to use
• Used in homes, Educations Institutions and Organizations
as nodes
• Can perform typical activities like documentation, playing
games, surfing web to more complex activities as
programming, design, DTP etc.

6. Portable Computers
• Smaller and more powerful
• Easy to carry all around.
• Types:
–Laptops/Notebooks
–Subnotebooks
–PDAs (Personal Digital Assistants)

7. Laptops
• Same as PCs in functionality
• More Compact, Portable
• Operated on both battery and power.
• Less capacity compared to PCs

8. PDA – Personal Digital Assistant
• Like Mini computer in a general sense
• Smaller than laptops (can be called
Palmtops)
• Used to store information used frequently
wherever you go ie day to day activities.
• Nowadays work with smart cards which
has all the information of a user and
his/her transactions

10. Mini Computers
• Minicomputers are in between mainframes and
Microcomputers. They are also called midrange
computers.
• Client - Server Architecture is used.
• Used in many organizations, companies,
factories etc as it have to work 24 hours.

11. Mainframes
• Large computers both in terms of physical
size as well as computations
• Process several million instructions per
second.
• They support huge numbers of users
• Basically used to store and process huge
amount of data
• Used in banks, insurance companies,
airlines, railway stations ect.

13. Network Computers
• Collection of PCs
• Designed to connect internet called Internet
boxes, Net PCs and Internet appliances.
• Can share the information, work from anywhere
to anywhere.
• LAN – WAN – MAN – Internet

15. Workstations
• They are similar to PCs but with more
memory and a high speed processor
• They are intended to support network
operating systems and network
applications.
• They are used in architectural design,
video editing, scientists, animations etc.
• The more powerful workstations are called
super-micros.

16. Work station Computers

17. Servers
• A server is one for which many PCs are
connected.
• It has large capacity secondary storage
and more memory
• They host, like workstations, network
servers and operating systems
• They avoid duplicate installation of
applications and all users will access to a
common copy of the program

18. Supercomputers
• Extremely fast in operation 1 trillion
operations in nanosecond or even in
picoseconds.
• Massive parallel processing technology
used ie 8.6 billion calculations per sec.
• Fastest, costliest and powerful computer
available today.
• Application involves weather forecasting,
military applications, electronic design etc.