1. The Development of the
Computer Technology

2. Pioneers – Fathers of Computing
Charles Babbage
1791-1871
John Atanasoff
1903-1995
Konrad Zuse
1910 - 1995

3. Difference Machine
Charles Babbage

4. Z 1 Machine
Konrad Zuse

5. ABC Computer
Jone Atanasoff

6. Alan Turing
1912-1964

7. Pioneers
John Mauchly
1907-1980
Presper Eckert
1919- 1995

8. First Generation (1945)

9. First Generation (1945)
used vacuum tubes
weighed 30 tons
used 18,000 vacuum tubes
occupied a 3,000 cubic feet
had only 12K memory

10. Vacuum Tubes

11. Second Generation
(late1950s)
 used transistors
 became
–smaller
–faster
–reliable
–less expensive

12. Second Generation
(late1950s)

13. Third Generation (late
1960s)
 used integrated circuit
 resulted in a lower cost

14. Third Generation (late
1960s)

15.  used large scale integration (LSI)
LSI placed several thousand
transistors onto a single chip. It
was followed by the development
of very large-scale integration
(VLSI).
Fourth Generation
(early 1970s-mid 1970s)

16. Fourth Generation
(early 1970s-mid 1970s)

17. Fifth Generation of the
Computer
 Mega chip memory
 Parallel processing (vs. serial
processing)
 Natural language processing
 Artificial intelligence

18. Fifth Generation of the
Computer

19. Computer System
 CPU
 Input devices
 Output devices
 Storage devices

20. Storage Device
 Disks
 Hard drives
 CDs
 RAM
 ROM

21. Computer Memory
 Byte = One storage position
 Kilobyte = One thousand storage position
 Megabyte = One million storage position
 Gigabyte = One billion storage position
 Terabyte = One trillion storage position

22. Computer Memory
1 byte = 8 bits
Short for binary digit, the smallest unit of
information on a machine. A single bit can hold
only one of two values: 0 or 1. More meaningful
information is obtained by combining consecutive
bits into larger units. For example, a byte is
composed of 8 consecutive bits.

23. Computer Memory
7 = 0 0 0 0 1 1 1 1
6 = 0 0 1 1 0 0 1 1
5 = 0 1 0 1 0 1 0 1

24. Computer Memory
A= 0 1 0 0 0 0 0 1
B = 0 1 0 0 0 0 1 0
C= 0 1 0 0 0 0 1 1

25. Computer Memory
1 MB = 285 pages (text)
5 MB = The complete works of Shakespeare
or 30 seconds of TV quality video
1 GB = A pick up truck filled with paper
2 GB = 20 meters of shelved books
20 GB= A good collection of the works of
Beethoven