Computer software is divided into two major categories. System Software Application Software Each category has its own sub-categories. System Software

• Operating System Software
• Network Software
• Database Management software
• Development Tools, Programming language software, IDEs
• Other System Software such as drivers.

Application Software

• General business Productivity software
• Home Use Applications
• Cross Industry application software
• Utilities software
• Other application software

A Compiler compiles all the source code at once and executes. An Interpreter interprets line by line, one line at a time and executes that line.