Software Layers

Software is part of computer which is intangible. It tells what a computer supposed to carry out and how to do it. And, it drives hardware.
Software is divided in to three categories:
1. System software.
2. Application software.
3. Programming language.
System software controls and maintains the operations of the computer and its devices.
Application software makes user more productive and assist them with their tasks.
Programming language enables people to communicate instructions to a computer.