1. GENERATIONS OF
COMPUTERS

2. FIRST GENERATION 1951 - 1959 Use of vacuum tubes as a means of storing
data in the memory.
Made the use of punched cards obsolete
Computer boards were replaced by computer
program
Storage capacity of 100 bytes to 2 kilobytes
(2,000 bytes)
Can perform 2,000 to 16,000 addition
per second

3. SECOND GENERATION 1959 - 1964 TRANSISTORS Use transistors and diodes
Computers are smaller in size, faster, more reliable
and much greater in processing capacity
Has built-in error detecting device
Printers were developed
Storage capacity of 6 KB to 1.3 MB
Can process up to 6,000 to 3M operations per
second
TRANSISTORS
made of silicon
forty times faster than vacuum tubes

4. THIRD GENERATION COMPUTERS 1965 - 1970
Integrated solid circuitry was developed
Improved secondary storage devices
New input and output devices was developed
Increased speed of about 10,000 by means of IC’s
Multitasking
Can perform 100,000 to 400M operations per second
INTEGRATED CIRCUITS
Has many transistors in one silicon
Developed by Jack St. Claire Kilby in 1958
First IC was invented in 1961
Also known as the “silicon ship”

5. FOURTH GENERATION COMPUTERS 1970 - present
Development of microelectronics
Multiprocessing, multiprogramming, time sharing,
Multitasking miniaturization, operating speed,
and virtual storage
Can do more than one function
Its size was of the television or smaller
It can do 500, 000 to 1B operations per second
MICROPOCESSOR
Less than 1 inch square and can contain millions of
electronic circuits
A complete computer on a chip
Can input, process and output

6. FIFTH GENERATION COMPUTERS Present and beyond Artificial Intelligence
Devices are based on artificial
intelligence and are still in development
Includes voice recognition
Goal is to develop devices that respond
to natural language input and are capable
of learning and self - organization