Computer software and Subprogram

Computer software noun - (computer science) written programs or procedures or rules and associated documentation pertaining to the operation of a computer system and that are stored in read/write memory.

Subprogram and computer software are semantically related. In some cases you can replace term "Subprogram" with "Computer software", this terms are similar.

Subprogram noun - A set sequence of steps, part of larger computer program.

Computer software and subprogram are semantically related. You can use "Computer software" instead a noun "Subprogram".