.y | Amiga Yabba Compressed Archive Format |
.y01 | Corel Paradox Secondary Index |
.y02 | Corel Paradox Secondary Index |
.y03 | Corel Paradox Secondary Index |
.y04 | Corel Paradox Secondary Index |
.y05 | Corel Paradox Secondary Index |
.y06 | Corel Paradox Secondary Index |
.y07 | Corel Paradox Secondary Index |
.y08 | Corel Paradox Secondary Index |
.y09 | Corel Paradox Secondary Index |
.y3a | Yu-Gi-Oh! Online Avatar Format |
.y3d | Yu-Gi-Oh! Online Card Format |
.y3p | Yu-Gi-Oh! Online Profile |
.y3t | Yu-Gi-Oh! Online Tag |
.y4m | YUV4MPEG2 Video Format |
.y8pd | Password Finder Yahoo! Mail / Yahoo! Messenger Exported Password |
.yab | Yabasic Source Code |
.yadpcm | Raw Yamaha 4-bit ADPCM Format |
.yah | HeartBeat |
.yajl | YAJL Script |
.yak | KayakFoundry 3D Design |
.yal | Arts & Letters Clipart Library Format |
.yam | Yahoo! Auctions Data Format |
.yaml | YAML Document |
.yaodl | Powerflip 3D Image Format |
.yar | StarBoard Document |
.yast | YaST |
.yaws | Yaws Source |
.ybc | SUSE Linux Enterprise Server Display Settings |
.ybd | YobiDrive Link Format |
.ybhtm | YBook HTML |
.ybk | Microsoft Encarta Yearbook Format |
.ybm | Ad-Aware 2007 |
.ybrar | Ybook Ebook |
.ybrtf | Ybook Ebook |
.ybtxt | Ybook Ebook |
.ychat | Yahoo! Instant Messenger Chat Log Format |
.ycm | Yugioh Card Maker Format |
.ycp | SUSE Linux Enterprise Server Display Settings |
.yct | YahELite Chat Transcript |
.ydc | Konami Yu-Gi-Oh! Card Deck Format |
.ydl | Powerflip YAODL 3D Image Format |
.ydr | Yu-Gi-Oh! Power Of Chaos Replay Format |
.ydt | Konami Yu-Gi-Oh! Power Of Chaos Data Format |
.yel | Yellow Color Separation |
.yenc | YEnc Encoded Archive |
.yfs | YSFLIGHT Mission Format |
.yg0 | Corel Paradox Secondary Index |
.yg1 | Corel Paradox Secondary Index |
.yg2 | Corel Paradox Secondary Index |
.yg3 | Corel Paradox Secondary Index |
.yg4 | Corel Paradox Secondary Index |
.ygf | YWorks Binary Graph Format |
.ygn | YGen |
.yif | Mungyodance Game Data |
.yka | Yenka Model Format |
.ym | AY-3-8910 Audio Format |
.ymap | MindGenius Computer Aided Thinking Format |
.ymbk | Xilisoft Mobile Manager Phonebook |
.ymg | Yahoo! Messenger Format |
.yml | YAML Document |
.yml2 | YML Script Format |
.ymp | YaST Metapackage Format |
.ync | YEnc Encoded Format |
.yog | Outerra Recorded Video Format |
.yookoo | Yookoo Player Playlist Format |
.yos | HP Photosmart Essential Thumbnail Cache |
.ypc | WhyPic Picture |
.ypf | YahELite Configuration |
.ypr | BYOB Project Format |
.yps | Yahoo! Instant Messenger Format |
.yrcbkm | YRC Weblink Bookmarks Archive |
.yrm | Red Alert 2: Yuris Revenge Multiplayer Map |
.yrp | YGOPro Replay |
.yse | Yamaha Studio Manager Session |
.ysm | Yamaha Studio Manager |
.ysp | BYOB Sprite Format |
.yss | YcySoft Screen Saver Producer |
.ytf | Google Picasa Font Cache |
.yti | Google Picasa Plugin |
.ytif | Independence Instrument |
.ytr | I.R.I.S. OCR Data |
.yuv | YUV 16Bits Image Format |
.yw3 | YWriter 3 Project |
.yw4 | YWriter 4 Project |
.yw5 | YWriter 5 Project |
.ywemanifest | Yahoo! Widgets Manifest |
.ywl | YoWindow Data |
.ywp | YWriter 2 Project |
.yz | YAC Compressed Archive Format |
.yz1 | Yamazaki Zipper Archive |
File extensions are not normally displayed to users. To change this, go to Control Panel, select Appearance and Personalization and Folder Options. Next, select the View and find the option "Hide extensions for known file types". The option should be deselected (cleared) and confirmed with OK.