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+## Contribution Guidelines
+
+- Do not add files with personal, private data.
+
+- Initially, we try to stay close to the "Public ITS" distribution.
+
+- A pull request should adress one, and only one, concern.  For
+  example, adding a program or bug fix.
+
+- Individual commits within a pull request should consist of atomic
+  changes.  A single commit should neither be in a partial state, nor
+  should it contain multiple unrelated changes that could be split
+  into separate commits.
+
+- Add or update documentation in the pull request.  That includes both
+  README files in the repository, and files put into the ITS disk
+  image.
+
+- Do use the git history rewriting operations to modify pull request.