diff --git a/2025-10-30.md b/2025-10-30.md
index acd26f2..fac5bbf 100644
--- a/2025-10-30.md
+++ b/2025-10-30.md
@@ -83,3 +83,5 @@ bin 000 001 010 011 100 101 110 111
 decimal 1 2 3 4...  
 
 
+APT = Advance package tool  
+