diff --git a/src/Non-profit-accounting.md b/src/Non-profit-accounting.md
index 663f3c9..97ca3d1 100644
--- a/src/Non-profit-accounting.md
+++ b/src/Non-profit-accounting.md
@@ -1,4 +1,6 @@
 % Non profit accounting
 
+Also known as https://en.wikipedia.org/wiki/Fund_accounting.
+
 - [Non-Profit Accounting With Ledger CLI, A Tutorial](https://k.sfconservancy.org/NPO-Accounting/npo-ledger-cli/files/9f2a0cd1cc1bdeaec128e69a4b4c39687cb2c8c7/npo-ledger-cli-tutorial.md)
 - https://www.youtube.com/@Aplos