diff --git a/tools/tools.md b/tools/tools.md
index 89f072d..6ba4c6d 100644
--- a/tools/tools.md
+++ b/tools/tools.md
@@ -1 +1,9 @@
-# tools repository
\ No newline at end of file
+# tools repository
+
+
+## computer
+
+### electronic 
+
+KiCAD
+https://www.kicad.org
\ No newline at end of file