V.D.U: Visual Display Unit
VLSI: Very large scaled integrated circuit
UNIVAC: Universal Automatic Computer
ROM: Read only memory
RAM: Random access memory
MSDOS: MicroSoft Disk operating system
IC: Integrated circuit
LSI: Large scale integrated circuit
IBM: International Busines Machines
CRT: Cathod Ray Tube
ENIVAC: Electonic Numeric integrator and Calculator
BCD: Binary coded Decimal
bit: 1or0
Byte: 8 bits.