Q-Signals (in approximate order of usage)

QNF? = Is the net free?
QNF = The net is free & no mobiles are running
QRL? = Is the frequency busy?
QRL = The frequency is busy
QRV? = Are you ready to run?
QRZ = Stations please call me
QRV = I am ready to run
QSP? = Does anyone want a relay?
QSP = Relay wanted or heard
QSY = Change frequency (need to follow with amount)
QRX = Call or run later (QRX & QSX are nearly the same)
QSX = Stand by or standing by
QSY/QRX? = Choose to either run off frequency or wait
QNI = Check into the net
QNC = Information follows for the net
QTA = Abort the contact
QNO = I am leaving the net
QSL = Confirm or yes
QTH = Location and/or county
QRT = I am done transmitting (usually for day or perhaps for lunch etc.)

Common Net Abbreviations

CHN = County hunter's net
/M = Mobile station
CL = County line
AGN = Again
LC = Last call and sometimes last county
GA = Go ahead
TU = Thank you
GUD = Good
R = Correct
C = Correct
N = No or not correct
NIL = Nothing heard
DN = Down
(used with QSY & UP needs no abbrev. DN 2 means the mobile is moving down 2 Khz to run.)
TU = Thank you