Posted in Aviation, Business & Finance, Information Technology, Internet Slang Y stands for Why Y stands for Year Y stands for Yahoo! (Internet search engine) Y stands for Yes Y stands for Yellow Y stands for Corporation (IRB) Y stands for Income (economics) Y stands for Economy (class airfare) Y stands for Business Class (Air Freight; also see C, Economy Class) Y stands for Yard Y stands for Yankee (aviation letter code) Y stands for Yen (Japanese currency) Y stands for Yukon Territory (postal code designation, Canada) Y stands for Y Chromosome Y stands for Bundeswehr (German Armed Forces; number plate) Y stands for Tyrosine (amino acid) Y stands for Yaw Y stands for Yttrium Y stands for Yeoman Y stands for Luminance (signal) Y stands for Consolidated-Vultee Aircraft Corporation (manufacturer’s symbol; now Convair) Y stands for Yotta- (prefix, 10^24 or septillion) Y stands for Yocto (prefix for one septillionth, 10^ -24) Y stands for Male Chromosome Y stands for Yukon Standard Time Y stands for YMCA or YWCA (Young Men’s Christian Association or Young Women’s Christian Association) Y stands for Search and Rescue Unit (SRU) Error (US DoD) Y stands for US DoT tire speed rating (188 mph) Y stands for Vertical axis in Cartesian coordinate system Y stands for Navigational error of search craft Y stands for Prototype Aircraft Designation