Upcoming SlideShare
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×
Saving this for later? Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime – even offline.
Standard text messaging rates apply

# Lesson 4 data processing

1,750

Published on

0 Likes
Statistics
Notes
• Full Name
Comment goes here.

Are you sure you want to Yes No
• Be the first to comment

• Be the first to like this

Views
Total Views
1,750
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
29
0
Likes
0
Embeds 0
No embeds

No notes for slide

### Transcript

• 1. Data Processing
Lesson 4
• 2. 4-1 Early Developments in Electronic Data Processing
4- 2 Mark 1
4 - 3 The Eniac
4 - 4 The Edvac
4 – 5 Computer Generations
4 – 6 First Generation Computers
4 – 7 Second Generation Computers
4 – 8 Third Generation Computers
4 – 9 Fourth Generation Computer
• 3. Mark I
Howard Aiken began work on the Mark I at Harvard University
Mark I digital computer was completed in 1944
Mark I official name was Automatic Sequence Controlled Calculator.
Mark I functions:
Could perform arithmetic operations
Could locate information stored in tabular form.
• 4. Mark I
Processed numbers up to 23 digits longs and could multiply three eight-digit numbers in 1 second.
It was not an electronic computer but as rather an electromechanical one
• 5. THE ENIAC
ENIAC – Electronic Numerical Integrator and Calculator
ENIAC was developed by Presper Eckert Jr. aand John Mauchly from 1943 to 1946.
It has 18,000 vacuum tubes and required the manual setting of switches.
It could perform 300 multiplications per second
• 6. The EDVAC
EDVAC is the modified version of ENIAC
EDVAC – Electronic Discrete variable automatic Computer
EDVAC employs binary arithmetic
John von Neumann invented the EDVAC
• 7. Computer Generations
First Generation Computers
Second Generation Computers
Third Generation Computers
Fourth Generation Computers
• 8. First Generation Computers ( 1951-1959)
The use vacuum tubes in place of relays as a means of storing data in memory and the use of stored-program concept.
It requires 3.5 KW of electricity per day to keep the vacuum tubes running
• 9. Second Generation Computers ( 1959-1964)
Solid-state components ( transistors and diodes) and magnetic core storage formed the basis for the second generation of computers
• 10. Third Generation Computers ( 1965-1970)
Integrated solid-state circuitry, improved secondary storage devices and new input/output devices were the most important advances in this generation.
• 11. Fourth Generation Computers ( 1970 to present)
The major innovations were in the development of microelectronics and in the development of different areas in computer technology such as: multiprocessing, multiprogramming, miniaturization, time sharing , operating speed and virtual storage.
• 12. The Edvac