COMPUTER APPLICATIONS :
Programming: An instruction means specific action.A group of instruction which are in a particularr manner guiding to computer to get final result.
Software : A group of programmes
Software are of two types 
System software,Application software.
Application software is ment for specific program to be fulfilled.
System sofware means individual components are connected together to achieve common goal.
In software
MSDOS ( MICRO SOFT DISC OPERATING SYSTEM).
NO MULTIPLE WINDOWS ARE OPENED
WINDOWS
Multiple number windows are opened
UNIX
internal cornal based operating system
Linex
It is improved version of unix$$$$$$£
I AM FORBES