QSL'ing
QSL'ing was taken from Q codes used by the military and amateur radio, QSL meant acknowledge receipt.
Amateurs would often follow up contacts around the world by sending specially printed QSL cards. This was adapted by CB'ers and colourful cards featuring 'handles', pictures and so on appeared. They were originally sent to long range contacts (some users would run networks in the early hours of the weekend because it was quieter) during normal conditions at this time of day contact over 50 to 60 miles distance could often be obtained.
A spin off from QSL'ing was collecting - although originally it developed from users having special eyeball cards produced. Most of the CB radio magazines devoted regular features on QSL'ing.
Read more about this topic: CB Radio In The United Kingdom