List Of All Extensions And Filetypes - Y

This is an easy approach from me to give and describe each and every filetype and extension as much as possible.
here is the list for the information about various filetypes and extensions starting from alphabet Y

Extension	Information
Y	Amiga Yabba Compressed Archive (Amiga)
Y	Yabba Compressed File
y	UNIX yacc or bison Parser Generator File
Y	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
Y	Xcode Core Yacc Program (Apple Inc.)
Y	Desktop Color Separation Specification Yellow Layer
Y	Yacc: Yet Another Compiler-Compiler Grammar File
Y01	Paradox Secondary Index
Y02	Paradox Secondary Index
Y03	Paradox Secondary Index
Y04	Paradox Secondary Index
Y05	Paradox Secondary Index
Y06	Paradox Secondary Index
Y07	Paradox Secondary Index
Y08	Paradox Secondary Index
Y09	Paradox Secondary Index
Y2	Plugh!
Y64	Commandos 2 Game Mission
YAB	Yabasic Source
YAL	Arts & Letters Clipart
YANK	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
YAP	Castles & Catapults Game File (Infogrames Entertainment SA)
YAR	YAR Archive
YAR	Castles & Catapults Game File (Infogrames Entertainment SA)
YBAK	MindGenius Computer Aided Thinking File Backup (Gael Ltd.)
YBHTM	yBook HTML File (Spacejock Software)
YBK	Encarta Yearbook (Microsoft Corporation)
YBM	Face Bitmap
YBS	YBS Compressed Archive
YBTXT	yBook Text File (Spacejock Software)
YC	YAC Compressed Archive
YCT	YahELite Chat Transcript (David J. Binette)
YDC	Yu-Gi-Oh! Power of Chaos Card Deck (Konami Group)
YDK	Yusuf Data Recovery
YDL	YAODL 3D Scene Description (Silicon Graphics, Inc.)
YDO	Yarston Text Editor Text Document (YARSTON)
YEAH	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
YEAR	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
YEL	Yellow Color Separation (Adobe Systems Incorporated)
YENC	yEnc Encoded File
YG0	Paradox Secondary Index
YG1	Paradox Secondary Index
YG2	Paradox Secondary Index
YG3	Paradox Secondary Index
YG4	Paradox Secondary Index
YGD	Yougoodai Playlist (mode2)
YGF	yEd Graph Editor Y Graph Format (yWorks)
YGM	YahooGroupManager Ver. 1.x Database (GGNetworks)
YGM2	YahooGroupManager Ver. 2.x Database (GGNetworks)
YGN	yGen Project File (Spacejock Software)
YGO	Paradox Database-related File
YHF	Your Honey Frame Shape File (HotBounce programming & development)
YIF	Mungyodance Game Data (VULPvibe)
YIF	Graphic
YINS	Castles & Catapults Game File (Infogrames Entertainment SA)
YKEY	Castles & Catapults Game File (Infogrames Entertainment SA)
YLD	SMS Yield Monitor Data File (Ag Leader Technology, Inc.)
YLT	TheWord & Bible Companion Young's Literal Translation Bible
YM	Atari ST YM2149 Module/Song (Atari)
YMA	YMAG Center Data Exchange File (Ymag)
YMACRO	YaHoE File
YMAP	MindGenius Computer Aided Thinking File (Gael Ltd.)
YMG	Yahoo! Instant Messenger (Yahoo!)
YML	Javascript YML Document (YAML)
YML	Sailfish Yacht Analyzer XML-based Data File (Techsail)
YML	Ruby on Rails Database Configuration File (Ruby on Rails Project)
YMP	openSUSE One Click Install Metapackage (Novell, Inc.)
YMP	MicroSim PCBoard Mapping File
YMY	Castles & Catapults Game File (Infogrames Entertainment SA)
YN	Audio Utility Tuningwrench Compressed File
YNC	yEnc Encoded File
YNX	Seqmax Seqprest Compressed Audio File
YORK	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
YOU	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
YOUD	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
YPCL	Castles & Catapults Game File (Infogrames Entertainment SA)
YPF	YahELite Configuration (David J. Binette)
YPK	MicroSim PCBoard Mapping File
YPL	Yahoo! Player Playlist
YPS	Yahoo! Instant Messenger (Yahoo!)
YPT	Cryptic File
YRM	Command & Conquer Yuri's Revenge Unofficial Multiplayer Map (Westwood Studios)
YRO	Command & Conquer Yuri's Revenge Official Multiplayer Map (Westwood Studios)
YSE	Yamaha Studio Editor Session File (Yamaha Corporation)
YSM	Yamaha Studio Manager Session File (Yamaha Corporation)
YSP	Bitmap Graphic
YTR	I.R.I.S. OCR Data (I.R.I.S. s.a.)
YUV	Color Space Pixel Format
YUV3	CCIR 601 2:1:1 Bitmap
YV	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
YV2	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
YWEMANIFEST	Yahoo! Widget Manifest File (Yahoo! Inc.)
YWP	yWriter Project (Spacejock Software)
YYC	Wave Sapphire Distribution File
YZ	Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
YZ	YAC Compressed Archive
YZ1	DeepFreezer Compressed Archive (BinaryTechnology)