Abbreviations

UNDER CONSTRUCTION !!

GENERAL & RADAR

RQ REQUEST
CLR CLEARED TO / CLEARED / CLEARANCE
LT LEFT TURN
RT RIGHT TURN
HDG HEADING
DES DESCEND
CMB CLIMB
FL FLIGHT LEVEL
TL TRANSITION LEVEL
FT FEET
SQWK SQUAWK
APV APPROVED
AFM AFFIRM / YES
NEG NEGATIVE / NO
SDBY STANDBY
INFO INFORMATION
ID IDENTIFY
RTE ROUTE
RERTE RE-ROUTE
ADEP AERODROME OF DEPARTURE
ADES DESTINATION

AERODROME

TKOF TAKE-OFF
LDG LANDING / LAND
RWY RUNWAY
TWY TAXIWAY
PSN POSITION
TAX TAXI
HLDG HOLDING

' or FT FEET (example 3000' or 3000 FT is 3000 FEET)
ACFT aircraft
AD aerodrome
AFM affirm (yes)
ALT altitude
APP APPROACH
PAX passengers
ARR ARRIVAL
CLR clearance or cleared (authorized)
CMB climb
crs course
CTL CONTROL (facility)
DCT DIRECT
DEL Delivery (facility)
DEP Departure
DES DESCEND
disrgd disregard (ignore)
dnwd downwind
EST ESTIMATE(D)
EXP EXPECT
FL FLIGHT LEVEL
FPL FILED FLIGHTPLAN
FREQ FREQUENCY
FIC FLIGHT INFORMATION CENTER
g/d gear down
GND GROUND
GP GLIDE PATH
HDG HEADING
h/o hand-off
HLDG HOLDING (according to context)
h/s hold short
IAF INITIAL APPROACH FIX
ILS INSTRUMENT LANDING SYSTEM
INBD INBOUND
KT KNOTS 

 LLZ = Localizer

l/u and w = line-up and wait (<=> taxi into position and hold in USA)

min = minima

MM = Middle Marker

neg = negative (no)

NM = Nautical Miles

OM = Outer Marker

outbd = outbound

pax = passengers

pkg = parking

POB = People On Board (number of)

pos = position

rdr = radar

rep or rpt = report

req = request

rgr = roger (received)

r/h = right hand

r/m = reaching minima

r/p = report passing

r/v = radar vectors

rwy = runway

sby or stby = stand by

sq = squawk

stby or sby = stand by

std = standard

stdy = steady

s/u = start up

t/l or tl or tleft = turn left

t/p and hold = taxi into position and hold (<=> line-up and wait outside USA)

t/r or tr or tright = turn right

TWR = Tower (facility)

vect = vectors

wilco = will comply (will do what is requested)

wx = weather