This document defines various abbreviations, call signs, and acronyms used in amateur radio communications. It includes abbreviations for common phrases, types of modulation, international organizations like the ITU and IARU, and call sign structures for different countries like Sweden. It also lists common Q codes used to communicate technical information about stations and signals.

2.  Abbreviations
 Missing vowels
 Two letters
 Odd ones out
 Call signs
 National
 International

3.  MSG – MeSsaGe
 UR – yoUR
 K - oK

4.  BK – BreaK
 CQ – Seek You
 CW – Continuous Wave
 DE – From
 RX – Receiver
 TX – transmit
 AM – amplitude modulation
 FM – frequency modulation

5.  R – Receive (Roger)
 RST – Readability, Signal Strength, Tone
 UTC – Coordinate Universal Time (GMT)
 SSB – single side band

6.  AMTOR – Amateur teleprinting over radio

7.  SSTV - Slow Scan TV
 Seconds to minutes
Faith 7

8.  ITU – International Telecommunication Union
 1865
 Part of the UN
 International radio standards

9.  IARU – International Amateur Radio Union
 Confederation of National amateur radio
organisations
 1925
 Representation to ITU

10.  European Conference on Post and
Telecommunication Administration
 Conférence européenne des administrations
des postes et des télécommunications
 1959
 State telecomms

11.  PST – Post och Telestyrelsen
 Swedish government agency for post and
telecomms

12.  <country><area><person>
BIG------- Small
 Mostly: letter – number - letter
 Sweden
 SA, SB and SM – private
 SA and SK – radio clubs
 SL - defence

14.  SM3CER
 SM2CWX

15.  [host country/]<call sign>[/host area/][mobility]
 M – mobile
 AM – air mobile
 MM – marine mobile (in international waters)
 SM3CER / MM
 SM2CWX / 5 / M

18.  LA / SM3CER
 VE /SM2CWX

19.  QRV
 QRZ
 QSB
 QTH
 QRO
 QRX
 QSL
 QRS
 QRP
 QRM
 QRN
 QRK