diff --git a/latest/Firmware/README.md b/latest/Firmware/README.md
index 79cbc64..8e7538f 100644
--- a/latest/Firmware/README.md
+++ b/latest/Firmware/README.md
@@ -1,3 +1,5 @@
 ### Transponder firmware
 
-This is a vanilla Eclipse CDT project. Import it into your workspace and (assuming you have ARM cross compiler installed) it should be straightforward.
\ No newline at end of file
+This is a vanilla Eclipse CDT project. Import it into your workspace and (assuming you have ARM cross compiler installed) it should be straightforward.
+
+The application is mainly interrupt driven, with a single event queue being dispatched by main, so it's pretty much "bare metal". Given how much of the functionality relies on I/O and timer interrupts, the only thing an RTOS would add is a single task to dispatch asynchronous events, which main() can do just fine.
\ No newline at end of file