04. Roots of Computing lecture of computer science

Lecture

1. Dr. M. Tanvir Afzal
History of Computing
Roots of Computing

2. 2
Roots of Computing
Mechanical vs Electronics-driven
machines
Book: Computer Science : An Overview,
12th ed. By J. Glenn BrookShearand Dennis
Brylow
Page: 16-21
Roots of Computing
Dr. M. Tanvir Afzal

3. 3
Roots of Computing
Abacus:
Ancient China, Greek and Roman Civilization
Dr. M. Tanvir Afzal

4. 4
Abacus
Dr. M. Tanvir Afzal

5. 5
Technology of Gears:
Pascal from france(1623-1662)
Leibniz (1646-1716) from Germany
Babbage from England (1792-1871)
Roots of Computing
Dr. M. Tanvir Afzal

6. 6
Technology of Gears
Dr. M. Tanvir Afzal

7. 7
Data Storage
Pascal and Leibniz output in gear
Babbage produced output on paper (punch
cards)
Punch card helped in algorithm changes
In Geared Technology:
Dr. M. Tanvir Afzal

8. 8
Data Storage

9. 9
Mechanical to Electronic
Cost effective production of geared
Technology-challenge
Electromechanical machine by Stibitz in
1940 at Bell Labs
Mark-I at Harvard in 1944
Electronically Controlled
Mechanical Relays
Dr. M. Tanvir Afzal

10. 10
Vacuum Tubes
ENIAC (electronic numerical integrator and calculator)

11. 11
Occupied 1800 square feet
20, 000 vacuum tubes
1500 relays
10, 000 capacitors
70, 000 registers
200 Kilo Watt electricity
Weight 30tons
Cost = $487, 000
PKR = 62.5 millions
FactSheet: ENIAC by 1956
https://www.computerhope.c
om/jargon/e/eniac.htm
Dr. M. Tanvir Afzal

12. 12
Rapid Advancement
Transistor
Integrated Circuits
Size reduction
Processing Power doubling in 2 years
Desktop computer by Steve Jobs and Stephen
Wozniak in 1976
IBM launched PC in 1981
Web
Smart Phones
Dr. M. Tanvir Afzal

13. 13
Summary
History of Computing
Abacus to Smart phone
Dr. M. Tanvir Afzal