Hi Colin, no problem re abbreviated text.
Just to clariy, for those who are not aware, these abbreviations are amateur radio terms which are used when decoding CW.
CW being an abbreviation itself for "continuous wave" as used in morse code.
Morse code was introduced around 1830s and by the 1930s (long before mobile phones / texting etc.) , CW was the preferred form of communication for aviators and seamen, and it was vital during the Second World War.
mni tnx de g0wsp (70 turns on the coil) -.- 👍