More L.o.L etc.

AFC:

— automatic frequency control
— Air Force Cross
— Appolo Flight Control

BRB:

Borba (Yugoslav– Struggle– leading newspaper in Communist-controlled Yugoslavia)
— British Railways Board

FU:

— Farmers Union
— Friends University

LOL:

— length of lead (actual)
— little old lady
— Lobitos Oilfields Limited

WTF:

— will to fire
— Waterford

SOB:

–shortness of breath

SUP:

–Sailors Union of the Pacific

WE:

— Western Electric

YDT:

— diving tender (naval symbol)

from Abbreviations Dictionary, New International Fourth Edition (1976) [currently unavailable at Amazon, SOZ].