diff --git a/source/README.md b/source/README.md
index ba3bb0e..06626cd 100644
--- a/source/README.md
+++ b/source/README.md
@@ -1,2 +1,8 @@
-### File structure
+## Components
+- **AppletCompanion**: The homebrew application for interfacing with the sysmodule.
+- **ControllerLib**: The controller driver library. Since it is up to the user to provide the USB implementation, this library becomes platform independent. To use it, one must inherit abstract classes `IUSBDevice`, `IUSBInterface`, `IUSBEndpoint` and implement them for your target platform.
+- **ControllerSwitch**: The switch implementation for **ControllerLib**. It contains the wrappers for the abstract classes, as well as classes responsible for creating a virtual controller on the switch.
+- **Sysmodule**: The background process that does all the work. Responsible for detecting controllers and holding controller information, applying any changes in the config, writing to log.
+
+## File structure (sysmodule)
 ![](map.png)