Operations, maintenance and contracts
Changelog
In short and in plain language
A changelog is a list of changes. It comes with a new version of a program.
It says, for example, which bugs have been fixed.
Before an update, the list helps. You can see what you should test.
Definition
A changelog is a list of the changes that a new version of a piece of software brings. It names, for example, fixed bugs, closed security holes and changes that may require adjustments to extensions. Before an update, it helps to judge what should be tested.