diff --git a/docs/about.md b/docs/about.md
index af05ec78..f3204535 100644
--- a/docs/about.md
+++ b/docs/about.md
@@ -33,13 +33,29 @@ Finally, the {doc}`technical reports </reports>` on these pages
 tips and tricks, some of which can be of interest to general Python users as
 well!
 
+:::{dropdown} Deprecated projects
+
+The main packages listed above originate from the following, deprecated
+projects:
+
+<!-- cspell:ignore pycompwa -->
+
+- {doc}`ComPWA <ComPWA:index>`: a single framework for Partial Wave Analysis
+  written in C++.
+- {doc}`pycompwa <pycompwa:index>`: the Python interface of ComPWA, which also
+  hosted a first version of the PWA Expert System.
+- {doc}`PWA Expert System <expertsystem:index>` (split into
+  {doc}`QRules <qrules:index>` and {doc}`AmpForm <ampform:index>`).
+
+:::
+
 ## Long-term development
 
 Partial Wave Analysis is a complicated research discipline, where several
 aspects of quantum field theory, experimental physics, statistics, regression
 analysis, and high-performance computing come together. This has led to
-{ref}`a large number of PWA frameworks <software:Other recommendations>` that
-taylor to the need of each collaboration.
+{ref}`a large number of PWA frameworks <pwa:software:Inventory of PWA projects>`
+that taylor to the need of each collaboration.
 
 This state of affairs is only natural: research requires a flexible and
 specialized approach. If, say, some background component shows up in an ongoing
diff --git a/docs/develop.md b/docs/develop.md
index 6480e8f8..73fcf86b 100644
--- a/docs/develop.md
+++ b/docs/develop.md
@@ -64,8 +64,8 @@ administrator rights, see instructions on
 [this page](https://www.anaconda.com/distribution). In addition, Conda can
 install more than just Python packages.
 
-All projects
-{ref}`affiliated with the PWA pages <software:Affiliated projects>` provide a
+All packages {ref}`maintained by the ComPWA organization <about:Main projects>`
+provide a
 [Conda environment file](https://docs.conda.io/projects/conda/en/latest/user-guide/tasks/manage-environments.html)
 ([`environment.yml`](https://github.com/ComPWA/ampform/blob/main/environment.yml))
 that defines the minimal dependencies to run the framework. To create an
@@ -607,10 +607,10 @@ Publicly available are:
 ### Branching model
 
 While our aim is to maintain long-term, stable projects,
-{ref}`PWA software projects <software:Affiliated projects>` are academic
-projects that are subject to change and often require swift modifications or
-new features for ongoing analyses. For this reason, we work in different layers
-of development. These layers are represented by Git branches.
+{ref}`PWA software projects <pwa:software:Inventory of PWA projects>` are
+academic projects that are subject to change and often require swift
+modifications or new features for ongoing analyses. For this reason, we work in
+different layers of development. These layers are represented by Git branches.
 
 ![Epic branches](./_static/epic-branches.svg)