As you all might know, timeschedules are relative often equipped with the A/C-type along with the scheduled dep./arr. And most of the timeschedules have similar 3-letter abbreviations eg.:
100 for a Fokker 100
310 for an Airbus A310,
AN4 for an Antonov 24,
B11 for a BAC One-eleven
J31 for a BAe Jetstream 31 and so forth
These abbreviations a slightly different from the (mostly) 4-letter ICAO code-designators.
So here's my question:
Does any of you know where I can find the standard for these 3-letter codes, used in timeschedules. (I've all-ready got the ICAO-code list).
Any help would be highly appreciated