diff --git a/journal/2022_05_02.md b/journal/2022_05_02.md
index 4bb82f1a2..e31eca3c2 100644
--- a/journal/2022_05_02.md
+++ b/journal/2022_05_02.md
@@ -1,2 +1,4 @@
 - sent out [[the agora is a social knowledge graph]] to [[pkg book]] and [[ivo]].
-- first day of work after [[international workers day]].
\ No newline at end of file
+- first day of work after [[international workers day]].
+- [[pid controllers]] look interesting.
+	- [[j l]] told me about them.
\ No newline at end of file