The document discusses the history and types of computers. It notes that the first computer was invented at the University of Pennsylvania and that IBM created the first computer operating system in 1985. It describes microcomputers as small, inexpensive personal computers first exemplified by the 1973 Altair, mini computers as larger than micros and used in banks and universities with the first being the 1960 PDP-1, and mainframes as very powerful, large and expensive with the first being the 1946 Harvard Mark I weighing 5 tons. The document also mentions supercomputers as the most powerful for applications like weather forecasting, with the first being the CDC 6600 designed by Seymour Cray. It concludes by listing common computer parts.

2. This is the university of Pennsylyania ,Where first
Computer was invented.

3. This is IBM Company which has made first computer
operating system in 1985. IBM is a computer Hardware
Company

4. This is a Micro Computer. These computers are small in size and cost less. These
computers are also called as Personal Computers. These Computers are mainly used
in homes , schools , banks etc. The name of first micro computer was Altair and was
released in 1973.

5. This is a mini computer. These computers are bigger in size
than of Micro Computers. These computers are used in
banks , universities etc. The first mini computer was
invented by Kenneth Olsen in November 1960.The name of
first mini computer was PDP-1 and costs RS.1,20,000.

6. These are mainframe computers and are very powerful. They are
big in size with a large memory and high speed. Mainframe
computers are very expensive. The Mainframe computer was
invented in 1946 and was designed by J . Presper Eckert and John
Mauchly. The name of First Mainframe Computer was Harvard
Mark I. and weighted 5 tons.

7. These are super computers and most powerful computers with a
huge processing speed. These computers are used for weather
forecasting , space research , satellite control etc. The name of first
computer was CDC 6600. Super Computer was designed , invented
and made by Seymour Cray. $.200 Million are used to build Super
Computer

8. Parts of Computer:-
1)Keyboard:

9. 2)Mouse

10. 3) CPU

11. 4)RAM

12. 5) Harddisk

13. 6) Monitor

14. 7) Printer