Term	Explanation	Examples
Ya, Yak	Initials of Yakovlev design Bureau	Ya-7, Yak-36
YaMG	Initials of Yakov Modestovich Gakkel	YaMG
Ye	Alternative spelling for cyrillic E, used for some experimental/prototype aircraft	Ye-1, Ye-2 etc
Yer	Initials of Yermolaev Design Bureau	Yer-2, Yer-4