diff -r 79d4c281a63b -r 9170a7dff573 docs/Writerside/topics/about.md
--- a/docs/Writerside/topics/about.md	Fri Nov 07 18:42:06 2025 +0100
+++ b/docs/Writerside/topics/about.md	Fri Nov 07 19:13:28 2025 +0100
@@ -34,6 +34,7 @@
 * adds support for integer keys to CxHashKey
 * adds support for comparing arbitrary strings without explicit call to cx_strcast()
 * adds cxListClone() and cxMapClone()
+* adds cxListUnion(), and cxMapUnion()
 * adds cxListDifference(), cxMapDifference(), and cxMapListDifference()
 * adds cxListIntersection(), cxMapIntersection(), and cxMapListIntersection()
 * adds cxListContains() and cxMapContains()