Software release

A software release is to create a new version of the system or program and release it to the user community. Each time a software system or program is changed, the programmers and company doing the work decide how to distribute the changes or the changed system or program to those people using it.

A software patch is a method of distributing the changes. It is either a program that modifies the original unchanged system or program to create the new one or a list of instructions for a person who follows them to create a new one.