Expanded glossary.

Author: Frostie314159

src/Glossary.md

@@ -1,9 +1,10 @@
 # Glossary
 
-### MAC
+Short term | Meaning | Notes
+-- | -- | --
+MAC | Medium Access Control | This is context dependent
+RF | Radio frequency | 
+ISM Band | Industrial Scientific and Medical Band | The frequency band, in which WiFi, BT and IEEE 802.15.4 operate, is the 2.4GHz ISM BAND
+WLAN | Wireless Local Area Network | This is defined in IEEE 802.11
+WiFi | Expensive certification for IEEE 802.11 compliance; No direct meaning | The WiFi Alliance specifies the different WiFi revisions like WiFi4-7, which are a subset of the IEEE 802.11 in the sense, that they specify which features are required and which are optional for certification. WLAN and WiFi can in practice be used interchangebly
 
-Media Access Layer
-
-### RF
-
-Radio Frequency