What does YA stand for?

Afghanistan - Civil aircraft markings - international (PIPO)

Army of Yugoslavia (SAUS)

Ash Lighter - Navy symbol

Government Civil Aviation Authority - ICAO designator (ICDA)

Yacht Architect (SAUS)

Yagi Antenna (UWER)

Yams - Soil biology - Human-introduced crops (QSUL)

Yaw Axis

Year Authorized (NITA)

Yersinia Arthritis - Medicine (DMAA)

Yesterday - Telegraphy (PCTE)

Yet Another - Computer hacker terminology (NHD)

Yosemite Association (EA)

Young Achiever - Australia

Young Adult - Refers to books published for this market

Young America - NCIC firearms make code (NCIC)

Young Audiences (EA)

Youth Authority (SAUS)

Youth Authority Programs - Public human service program (PHSD)

Yttrium Aluminate (UWER)

Yttrium Aluminide (UWER)

Yugo - Society of Automotive Engineers auto manufacturer code for service information interchange

Yarn (VRA)