Fundamental And Disk Operating System



 

UNIVAC 

Universal Automatic Computer

 

 

There are no computers with the name as in other options. UNIVAC was the first general purpose electronic digital computer designed for commercial use, produced by Universal Accounting Company of John Mauchly and J.P.Eckert in 1951.

 

CD-ROM

Compact Disk Read Only Memory

 

 

There are no objects with the name as in other options. CD-ROM is a non-volatile optical data storage medium using the same physical format as audio compact disk, readable by a computer with a CD-ROM drive. The standard 12 cm diameter CD-ROM store about 660 megabytes.

 

ALU

Arithmetic Logic Unit

 

 

ALU is a unit in Central Processing Unit in a computer system that is responsible for arithmeticcalculations and logical operations. Apart from ALU, the CPU contains MU (Memory Unit) and CU (Control Unit).

 

VGA

Video Graphics Array

 

 

VGA is a type of Graphics Adapter. Graphic Adapter is an electronic board that controls the display of amonitor. This device helps the motherboard to work with the monitor and in VGA and SVGA the last letter ‘A’ stands for ‘Array’ whereas in MDA, CGA, MCGA the last letter ‘A’ stands for ‘Adapter’.

 

. IBM 1401

Second Generation Computer

 

 

IBM 1401 is a Second Generation Computer and is the first computer to enter Nepal in 2028 BS for census. Government of Nepal had brought this computer on rent and later purchased for data processing in Bureau of Statistics. After this computer, another ICL 2950/10, a British computer, was purchased by the fund of UNDP and UNFPA for the census of 2038 BS is second computer in Nepal.

 

MSI

Medium Scale Integrated Circuits

 

 

After the invention of IC chips the development of computers plunged into next phase. Small Scale Integration and Medium Scale Integration (SSI and MSI) were used in third generation of computers and Large Scale Integration and Very Large Scale Integration (LSI and VLSI) are being used in fourth generation of computers. People are now expecting ULSI (Ultra Large Scale Integration) Circuits to be used for fifth generation computers.