Monday, November 12, 2007

Generation Of Computer

6 comments

Generation in computer is a step in technology.It provides a framework for the growth of the computer industry.Computers are generally classified into different generations according to the memory device used in the computers.So the term "generation" was used to distinguish between varying hardware technologies.There are totally five generations till today.Generation of computers are listed in the table below.

If you are unable to see the table below,just copy the table and paste it in to Microsoft Word.

Generation

Duration

Memory Device

Features

Example

First

1942-1955

Vacuum Tubes or Valves

Ø used vacuum tubes as electronic circuit

Ø magnetic drum for primary storage

Ø mercury delay lined for memory

Ø punch-card used as secondary storage

Ø machine level programming used

Ø operating speed was used in terms of millisecond

Mark-I, UNIVAC,

ENIAC

etc.

Second

1955-1964

Transistor

Ø magnet core memory used as internal storage

Ø magnet tapes used as secondary storage

Ø little bit faster I/O devices

Ø high level language used as programming

Ø processing speed measured in microsecond

IMB 1401,

ICL 2950/10

etc.

Third

1964-1975

IC(Integrated circuits)

Ø semi conductor memory used as primary storage

Ø magnetic discs were used as secondary storage

Ø massive use of high level language

Ø processing speed increased to nanosecond and even faster

IBM 360 series,

UNIVAC 9000

etc.

Fourth

1975-1990

VLSI or Microprocessor

Ø massive use of magnetic and optical storage devices with capacity more than 100 GB

Ø advancement in software and high level language

Ø use of 4th generation language(4GL)

Ø operation speed increased beyond picoseconds and MIPS (Millions of Instructions Per Second)

IBM PC,

Pentium PC,

Apple/Macintosh

etc.

Fifth

1990+

Bio-Chips

Ø AI will make computer Intelligent and knowledge based

Ø very high speed, PROLOG (programming language)

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6 comments :

  1. I think Computers are generally classified into different generations according to the memory device used in the computers.

    ReplyDelete
  2. I already know computer generation, but i have found it very effective for the new computer learner.

    ReplyDelete
  3. awesum information... very help full....

    ReplyDelete
  4. May I use this table to create a poster for my classroom?

    ReplyDelete
  5. yes,sure...you can use it for educational purpose...thanks !

    regards,
    aakar

    ReplyDelete