EEUE Computer

ENIAC:-

        ENIAC stands for Electronic Numerical Integrator and Calculator.It was the first electronic general purpose computer invented by Johan W Mauchly and John Presper Eckers in 1946 AD. It was 10 feet tall and occupied a space of 30*30 feet.It contained 1800 vacuum tubes as a main memory .It required about 150 kilowatts of power .It could perform many complex arithmetic operations in less than a second.The ENIAC was developed to generate ballistic firing tables for the artillery.

EDSAC

       EDSAC stands for Electronic  Delay Strong Automatic Computer .It was the first operational stored program computer .It was started early in 1974 AD, in the Cambridge University by a team under the leadership of Professor Mourice Wilders,The machine executed its first programs in 1949 AD.It contained 3,000 vacuum tubes and it required 30 kilowatts of electric power.Computer programs were input using paper tape and output results were printed on a teletype printer.

UNIVAC

       UNIVAC stands for Universal Automatic Computer.It was developed by Dr.John Manuchly and John Presper Ecker in 1951AD.It was the first general purpose electronic digital computer.The computer consisted of magnetic tape for data input and output.It had 10,000 vaccum tubes .This computer was used for data processing till 1963 AD in the USA.

EDVAC

 

       EDVAC stands for Electronic Discrete Variable Automatic Computer .It was designed by Moore School Personnel and the Ballistics Research Laboratory of the US Army in 1952 AD.It was able to store programs .This concept was introduced by a Hungarian mathematician. John Von Newmann in 1947 AD.

      All the above prominent contributions were significantly relevant to the emergence of the today’s computer .So the modern computer has come to this stage.

FULL FORMS_1

FULLFORMS

FMC                     =                      Flight Management Computer

EICAS                  =                      Engine Indicator and Crew Aler System

LAN                     =                      Local Area Network

MAN                    =                      Metropoliton Area Network

WAN                    =                      Wide Area Network

IBM                      =                      International Business Machine

DEC                     =                       Digital Equipment Corporation

NAC                    =                       Nepal Airlines  Corporation

MODEM              =                       Modulator and Demodulator

ALR                     =                        Advance Logic Research

XT                       =                        Extended Technology

AT                       =                        Advance Technology

PS/2                    =                        Personal System 2

TECHHNICAL TEARMS AND MEANINGS

Network             :                       A set of computer devices connected logically so as to exchange data

LAN                   :                       Network of computer in a small area such as school and offices.

MAN                  :                       Network of computer all over the world.Internet is a WAN.

Co-processor      :                       A small chip which assists the main processor for faster operation example

                                                   math co-processor.

Brand                  :                       A  name given to a product or service;trade name

POINTS TO REMEBER

1. Classically,Computer are classified on the basis working principle ,size,brand and  model
2. Computer can be classified into three types of the basis of working principle.The: Analog computer,Digital computer and Hybrid computer.
3. Analog computer works on the principle of continuous change of physical values such as temperature,pressure.
4. Digital computer work on the principle of two discrete values : 0 and 1.
5. Hybrid computer perform task of both digital and analog  computer.
6. Super computer ,Minframe computer ,Mini computer and Micro computer are digital Computer.
7. Super computers are the fastest and powerful of all the computers.
8. Mainframe computers are large in size and supports number of terminals and users the same time.
9. Mini computer is bigger than micro computer and smaller than mainframe computer.
10. Micro computer are the smallest computers.Laptop and notebooks are also micro computers.
11.