Source control

Source control allows a developer to go back to previous version of a file. In source control not only a current version of a file is saved, but the history of file changes is saved too. It is possible to go back or retrieve that version of a file. 

Along with file changes it is possible to submit comments about the submission. It can be a bug fix, or some new functionality. Comments will explain of what is going on.

There are number of source control applications there. A popular one is Git.

It is possible to label to which source control branch files will belong to. By doing so it is possible to distinguish between which version of application will receive the update.

A company may decide for how long software will be supported. After that cut off period it is unlikely that software will receive any updates.

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