This document provides a brief history of computers from early calculating devices like the abacus to modern computers. It discusses early pioneers like Blaise Pascal who invented the first mechanical calculator. It then outlines the development of Charles Babbage's analytical engine, considered the first general-purpose computer. Finally, it summarizes the evolution of computers from vacuum tubes to integrated circuits and the development of operating systems, programming languages, and commercial applications.

2. Computer Definition
A computer is an
electronic device
that can perform
variety of tasks
according to set
of instructions
given by the user.

3. Abacus is an
calculating device.
Abacus was
developed in china
almost 5000 years
ago.
Abacus

4. Blaise Pascal
In 1642 the famous
French
mathematician
Blaises Pascal
invented a device
called “Arithmetic
Engine”

5. Pascal’s Calculator
This was the first
successfully
mathematical
calculator
It has complex
arrangement of
wheels and gears.

6. Charles Babbage
In 1835 Charles
Babbage an
English
mathematician
designed on paper
an “analytical
engine “.

7. Babbage’s Analytical Engine
He could not
actually produce it
because the
technology of the
time was not
advance enough.

8. Augusta Ada Byron
Ada Byron is the
first programmer
of the world. She
write meaning full
code for Babbage's
Analytical engine.

11. Thousand of Vacuum tube
Electromagnetic memory
Punched cards used
Assembly language

12. Machine languages
Assembly languages
Use in scientific
application
Bulky in size

14. Transistor used
Magnetic core memory
Magnetic tape as storage
Batch processing system

15. High level prog.
language
Electromagnetic memory
Scientific purpose
Faster then previous

17. Integrate circuit-SSI,MSI
Magmatic core memory
Magnetic tape as storage
Batch operating system

18. Timesharing operating
system
Commercial applications
Faster – smaller then previous
Minicomputers introduced

20. Integrated with VLSI
Microprocessor
Semiconductor memory
Spread high-speed
computer network

21. GUI based operating
system
Unix operating system
C programming language
Network based
application

23. Integrated with ULSI
Larger capacity of hard
disk
Powerful desktop PCs
Powerful mainframe

24. Word wide web
Multimedia application
Portable computer
General purpose
machines

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