diff --git a/book/en/src/preface.md b/book/en/src/preface.md
index f833213ed4..6041dfedea 100644
--- a/book/en/src/preface.md
+++ b/book/en/src/preface.md
@@ -21,6 +21,18 @@ This is the documentation of v1.0.x of RTIC; for the documentation of version
 * v0.5.x go [here](/0.5).
 * v0.4.x go [here](/0.4).
 
+## Is RTIC an RTOS?
+
+A common question is whether RTIC is an RTOS or not, and depending on your background the
+answer may vary. From RTIC's developers point of view; RTIC is a hardware accelerated
+RTOS that utilizes the NVIC in Cortex-M MCUs to perform scheduling, rather than the more
+classical software kernel.
+
+Another common view from the community is that RTIC is a concurrency framework as there
+is no software kernel and that it relies on external HALs.
+
+---
+
 {{#include ../../../README.md:7:47}}
 
 {{#include ../../../README.md:48:}}