CQ  = General Call
QRG = Tell me exact frequency
QRH = Does frequency vary?
QRI = How is tone of transmission?
QRK = Readability of signal is
QRL = Are you busy? I am busy
QRM = Manmade interference
QRN = Static 
QRO = Increase power
QRP = Decrease power
QRQ = Send faster
QRS = Send slower
QRT = Stop sending
QRU = Do you have anything for me?
QRV = Are you ready? I am ready 
QRW = I am calling on... frequency
QRX = What is the next schedule?
QRZ = Who is calling?
QSA = What is the signal strength?
QSB = Are my signals fading?
QSD = Is my keying defective?
QSG = Send... message at one time
QSL = Acknowledge receipt
QSM = Repeat last message
QSO = Communicate direct or via relay
QSP = Will you relay to...?
QSV = Send series of V's
QSW = Will you send on this frequency?
QSX = Shall I switch to another frequency?
QSY = Switching frequencies
QSZ = Send each group twice
QTA = Cancel message
QTB = Do you agree with number of words?
QTC = How many messages to you have to send?
QTH = Location
QTR = Exact time

A = Alfa            N = November
B = Bravo           O = Oscar
C = Charlie         P = Papa
D = Delta           Q = Quebec
E = Echo            R = Romeo
F = Foxtrot         S = Sierra
G = Golf            T = Tango
H = Hotel           U = Uniform
I = India           V = Victor
J = Juliett         W = Whiskey
K = Kilo            X = X-RAY
L = Lima            Y = Yankee 
M = Mike            Z = Zulu