1. History of Computers
by Aaron Goldwasser

2. • ENIAC (electrical
numerical integrator and
calculator).
• used from 1946 to 1955
• used vacuum tubes
First Computer

3. Progression of
Hardware
• 1950s:Vacuum tubes
• 1955-1965:Transistors
• 1965-1975: Integrated circuits
• 1967- 1970: Circuit boards
• 1970-now: Silicon computer

4. Vacuum Tubes
• Invented in 1906 by Lee de Forest
• Big as a fist
• The tubes heat up and release electrons in
to the tubes
• Acts as switch or an amplifier

5. Transistors
• invented in 1958 by Jack C. Kilby
• Solved a lot of problems that vacuum tubes
had
• Had problems of its own
• Likelihood of faulty wiring increased the
more complex the circuits became

6. Integrated Circuits
• Made by Jack Kilby and Robert Noyce
• Thousands of bits on the size of a fingernail
Robert Noyce
Jack Kilby

7. Circuit Boards
• made by Paul Eisler in 1967
• thousands of bits on the size of a hand

8. Silicon Chip
• made by Jack Kilby and Robert Noyce
• millions of bits on the size of a finger nail
• made in 1970
Jack KilbyRobert Noyce

9. First PC
• made by Philip Don Estridge
• made in 1980
• named IBM PC

10. Internet Begins
• In 1990 Tim Lee, working with Robert
Cailliau at CERN propose a 'hypertext'
system, which is the first start of the
Internet as we know it today.

11. First Major Apple OS
• Apple introduces System 7 OS May 13,
1991.

12. First Notebook
• IBM introduces ThinkPad, the industry's first
notebook, in

13. Webpage
• President Bill Clinton puts the United States
White House online on 26th Jun, 1993.

14. made
• Microsoft releases Internet Explorer 1.0 on
August 16, 1995

15. Google lives!
• Google is first developed by Sergey Brin and
Larry Page.

16. Facebook goes online
• The domain facebook.com comes online
March 28, 1997

17. Sony makes the memory
stick
• Sony introduces the Sony Memory Stick.

18. First iMac
• Apple introduces the iMac, the iMac helps
bring Apple back on the computer maps as a
very easy and friendly computer

19. Microsoft bails out
Apple
• Microsoft saves Apple with a $150 million
investment August 6, 1997

20. Windows XP is released
• Microsoft Windows XP home and
professional editions are released October
25, 2001.

21. Windows 2000
• Windows XP is released.