There are two ways by which one can acquire a program—either purchase an existing program, referred to as packaged software, or prepare a new program from scratch, in which case it is called customized software.
Computer software can be broadly classified into two categories: system software and application software.
1.System Software:
System software is a collection of programs that interfaces with the hardware. Some common categories of system software are described as follows ;
Application software is written to enable the computer to solve a specific data processing task.
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