File types with extensions that start with the letter Y

File Extention	File Type	Description
.y	Developer	Yacc Source File
.y	Compressed	Amiga Yabba Compressed File
.y	Raster Image	Subsampled Raw YUV Image
.y3a	Game	Yu-Gi-Oh! ONLINE 3 Avatar File
.y3d	Game	Yu-Gi-Oh! ONLINE 3 Deck File
.y4m	Video	YUV4MPEG2 Video File
.yab	Developer	Yabasic Source Code
.yal	Vector Image	Arts & Letters Clipart Library
.yam	Data	Yahoo! Auctions Data
.yaml	Developer	YAML Document
.yaodl	3D Image	PowerFlip 3D Image File
.ybd	Misc	YobiDrive Link File
.ybk	Misc	Microsoft Encarta Yearbook File
.ybk	eBook	YanCEyWare eBook
.ychat	Data	Yahoo! Messenger Chat Log
.ycm	Game	Yugioh Card Maker File
.ydc	Game	Yu-Gi-Oh! Card Deck File
.ydl	3D Image	PowerFlip YAODL 3D Image File
.ydr	Game	Yu-Gi-Oh! Power of Chaos Replay File
.ydt	Game	Yu-Gi-Oh! Power of Chaos Data File
.yenc	Encoded	yEnc File
.yfs	Game	YSFLIGHT Mission File
.ygf	Data	Y Graph Format File
.yka	Data	Yenka Model File
.ym	Audio	Atari ST Audio File
.ymg	Misc	Yahoo! Messenger File
.yml	Developer	YAML Document
.yml2	Developer	YML Script
.ymp	Developer	YaST Metapackage File
.ync	Encoded	yEnc Encoded File
.yog	Video	Outerra Captured Video File
.yookoo	Audio	Yookoo Player Playlist File
.ypr	Developer	BYOB Project File
.yps	Misc	Yahoo! Messenger Data File
.yrcbck	Backup	YRC Backup Archive
.yrcbkm	Data	YRC Bookmarks Archive
.yrcdat	Data	YRC Software Data Script
.ysp	Raster Image	BYOB Sprite File
.ytf	Font	Google Picasa Font Cache
.yuv	Video	YUV Video File
.yuv	Raster Image	YUV Encoded Image File
.yz	Compressed	YAC Compressed File
.yz1	Compressed	Yamazaki ZIPPER File