One
Two
Threee
It depends on the amount of memory in the computer
API
System utility
GUI
Command-based user interface
E-Spend
E-business
E-Commerce
E-World
Altair
Mark-B
Z2
Titan-1
CD
CD-Rom
DVD
RPM
Spammer
Hacker
Programmer
Instant messenger
Abacus
UNIVAC
EDSAC
ENIAC
Scanning
Output
Input
Software
Hardware
Peripheral devices
All of these
Monitor
Printer
Mouse
(a) and (b) both