A	System has Auto Patch	O	Open System
APRS	Packet Mapping Operations	PKT	Packet Operations
ATV	Amateur Television System	R	Affilliated with RACES
C	Closed System	RB	Remote Base System
CA	Closed Auto Patch	SNP	Shared Non Protected System
Cross-band	Cross Band System	Sx	Simplex Operations
DIGITAL	All Digital System	t	CTCSS tone needed to access this system
E	Emergency Power	TT	Touch Tone needed to access extra features
E-SUN	Emergency Power:Solar	WX	Weather Net or access to Weather Information
E-WIND	Emergency Power:Wind	X	Wide Coverage System
Exp	Experimental	Y	Digital: ASCII or RTTY System
L	Linked System	Z	System has access to Emergency Services