diff --git a/src/software/operating_system/index.md b/src/software/operating_system/index.md
index b039d95..35f1168 100644
--- a/src/software/operating_system/index.md
+++ b/src/software/operating_system/index.md
@@ -1,3 +1,12 @@
 # Operating System
 
 PeachCloud runs an _unofficial_ [preview image](https://people.debian.org/~gwolf/raspberrypi3/20190628/) of Debian 10 (Buster). Kernel version: 4.19.0-5-arm64.
+
+Debian was chosen over the Raspbian operating system for several reasons:
+
+ - Full ARM64 support, unlike Raspbian which uses 32 bit mode
+ - Flexibile deployment to a range of single board computers
+ - Access to latest code in Debian testing
+ - Relatively lightweight base install ( < 2GB )
+
+The downsides to this approach are a lack of support (most online resources assume use of Raspbian) and a minimal set of drivers on the base install.