diff --git a/docs/docs/docs/overview/architecture.md b/docs/docs/docs/overview/architecture.md
index 8146ba62b..af63ffe6d 100644
--- a/docs/docs/docs/overview/architecture.md
+++ b/docs/docs/docs/overview/architecture.md
@@ -3,4 +3,20 @@ sidebar_position: 1
 title: Architecture
 ---
 
-TODO
+## Jan overall architecture
+![Overall architecture](img/architecture-1.drawio.png)
+- Jan platform includes the following components:
+  - Processes:
+    - UI process: 
+      - This is Electron framework `renderer` component (Web technology equivalent)
+      - Jan provides core platform UI that:
+        - Allows App to `register()` function blueprint with name and arguments
+        - Run `execute()` registered App functions
+    - Node process (NodeJS technology equivalent)
+      - This is Electron framework `main process` component (NodeJS runtime)
+      - Jan provides core platform UI that:
+        - Allows App to `register()` function blueprint with name and arguments
+        - Run `execute()` registered App functions
+  - `@janhq/core` library that exposes Core API for App to reuse. Currently it only supports App `index.ts`
+
+- Vertically, there are `Platform Core` component and `App` component. Each of those includes UI and Node process that work in pair.