What distinguishes the backlog, roadmap and changelog?

Hi all.

Puzzled by the question what distinguishes the backlog, roadmap and changelog?
July 2nd 19 at 14:02
2 answers
July 2nd 19 at 14:04
Changelog - list of changes in the project that were made;
Roadmap - a list of possible planned future developments of the project;
Backlog - (not exactly sure) a list of what all should be(requirements, change, etc.)
July 2nd 19 at 14:06
changelog - changes in project
roadmap - plan tasks/development, moreover, both internal and visible to the end user
backlog - list of features required by the end user. Usually part of the roadmap

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