| Estensione del file | Autore/Produttore | Descrizione del file |
|---|---|---|
| Estensione Y | N/A | Amiga Yabba Compressed Archive Format |
| Estensione Y01 | Corel Corporation | Corel Paradox Secondary Index |
| Estensione Y02 | Corel Corporation | Corel Paradox Secondary Index |
| Estensione Y03 | Corel Corporation | Corel Paradox Secondary Index |
| Estensione Y04 | Corel Corporation | Corel Paradox Secondary Index |
| Estensione Y05 | Corel Corporation | Corel Paradox Secondary Index |
| Estensione Y06 | Corel Corporation | Corel Paradox Secondary Index |
| Estensione Y07 | Corel Corporation | Corel Paradox Secondary Index |
| Estensione Y08 | Corel Corporation | Corel Paradox Secondary Index |
| Estensione Y09 | Corel Corporation | Corel Paradox Secondary Index |
| Estensione Y3A | Konami | Yu-Gi-Oh! Online Avatar Format |
| Estensione Y3D | Konami | Yu-Gi-Oh! Online Card Format |
| Estensione Y3P | Konami Corporation | Yu-Gi-Oh! Online Profile |
| Estensione Y3T | Konami Corporation | Yu-Gi-Oh! Online Tag |
| Estensione Y4M | N/A | YUV4MPEG2 Video Format |
| Estensione Y8PD | Spotmau Corporation | Password Finder Yahoo! Mail / Yahoo! Messenger Exported Password |
| Estensione YAB | Yabasic | Yabasic Source Code |
| Estensione YADPCM | N/A | Raw Yamaha 4-bit ADPCM Format |
| Estensione YAH | CousySoft | HeartBeat |
| Estensione YAJL | lloyd | YAJL Script |
| Estensione YAK | Blue Heron Kayaks | KayakFoundry 3D Design |
| Estensione YAL | Arts and Letters | Arts & Letters Clipart Library Format |
| Estensione YAM | N/A | Yahoo! Auctions Data Format |
| Estensione YAML | N/A | YAML Document |
| Estensione YAODL | Silicon Graphics | Powerflip 3D Image Format |
| Estensione YAR | Hitachi | StarBoard Document |
| Estensione YAST | OpenSUSE | YaST |
| Estensione YAWS | N/A | Yaws Source |
| Estensione YBC | SUSE | SUSE Linux Enterprise Server Display Settings |
| Estensione YBD | EZC Group | YobiDrive Link Format |
| Estensione YBHTM | Spacejock Software | YBook HTML |
| Estensione YBK | Microsoft | Microsoft Encarta Yearbook Format |
| Estensione YBM | Lavasoft | Ad-Aware 2007 |
| Estensione YBRAR | Spacejock Software | Ybook Ebook |
| Estensione YBRTF | Spacejock Software | Ybook Ebook |
| Estensione YBTXT | Spacejock Software | Ybook Ebook |
| Estensione YCHAT | Yahoo! | Yahoo! Instant Messenger Chat Log Format |
| Estensione YCM | Super Simple Games | Yugioh Card Maker Format |
| Estensione YCP | SUSE | SUSE Linux Enterprise Server Display Settings |
| Estensione YCT | David Binette | YahELite Chat Transcript |
| Estensione YDC | Konami | Konami Yu-Gi-Oh! Card Deck Format |
| Estensione YDL | Silicon Graphics | Powerflip YAODL 3D Image Format |
| Estensione YDR | Konami | Yu-Gi-Oh! Power Of Chaos Replay Format |
| Estensione YDT | Konami | Konami Yu-Gi-Oh! Power Of Chaos Data Format |
| Estensione YEL | N/A | Yellow Color Separation |
| Estensione YENC | N/A | YEnc Encoded Archive |
| Estensione YFS | YSFLIGHT.com | YSFLIGHT Mission Format |
| Estensione YG0 | Corel Corporation | Corel Paradox Secondary Index |
| Estensione YG1 | Corel Corporation | Corel Paradox Secondary Index |
| Estensione YG2 | Corel Corporation | Corel Paradox Secondary Index |
| Estensione YG3 | Corel Corporation | Corel Paradox Secondary Index |
| Estensione YG4 | Corel Corporation | Corel Paradox Secondary Index |
| Estensione YGF | yWorks | YWorks Binary Graph Format |
| Estensione YGN | Spacejock Software | YGen |
| Estensione YIF | N/A | Mungyodance Game Data |
| Estensione YKA | Crocodile Clips | Yenka Model Format |
| Estensione YM | Atari | AY-3-8910 Audio Format |
| Estensione YMAP | MindGenius Ltd. | MindGenius Computer Aided Thinking Format |
| Estensione YMBK | Xilisoft Corporation | Xilisoft Mobile Manager Phonebook |
| Estensione YMG | Yahoo! | Yahoo! Messenger Format |
| Estensione YML | N/A | YAML Document |
| Estensione YML2 | N/A | YML Script Format |
| Estensione YMP | YaST | YaST Metapackage Format |
| Estensione YNC | N/A | YEnc Encoded Format |
| Estensione YOG | Outerra | Outerra Recorded Video Format |
| Estensione YOOKOO | Penguin George | Yookoo Player Playlist Format |
| Estensione YOS | Hewlett-Packard Company | HP Photosmart Essential Thumbnail Cache |
| Estensione YPC | N/A | WhyPic Picture |
| Estensione YPF | David Binette | YahELite Configuration |
| Estensione YPR | BYOB | BYOB Project Format |
| Estensione YPS | Yahoo! | Yahoo! Instant Messenger Format |
| Estensione YRCBKM | YRC Group Inc. | YRC Weblink Bookmarks Archive |
| Estensione YRM | Electronic Arts, Inc. | Red Alert 2: Yuris Revenge Multiplayer Map |
| Estensione YRP | YGOPro Project | YGOPro Replay |
| Estensione YSE | Yamaha Corporation | Yamaha Studio Manager Session |
| Estensione YSM | Yamaha Corporation | Yamaha Studio Manager |
| Estensione YSP | BYOB | BYOB Sprite Format |
| Estensione YSS | YcySoft | YcySoft Screen Saver Producer |
| Estensione YTF | Google Picasa Font Cache | |
| Estensione YTI | Google Inc. | Google Picasa Plugin |
| Estensione YTIF | Yellow Tools | Independence Instrument |
| Estensione YTR | I.R.I.S. s.a. | I.R.I.S. OCR Data |
| Estensione YUV | N/A | YUV 16Bits Image Format |
| Estensione YW3 | Spacejock Software | YWriter 3 Project |
| Estensione YW4 | Spacejock Software | YWriter 4 Project |
| Estensione YW5 | Spacejock Software | YWriter 5 Project |
| Estensione YWEMANIFEST | Yahoo, Inc. | Yahoo! Widgets Manifest |
| Estensione YWL | Repkasoft | YoWindow Data |
| Estensione YWP | Spacejock Software | YWriter 2 Project |
| Estensione YZ | YAC | YAC Compressed Archive Format |
| Estensione YZ1 | Yamazaki ZIPPER | Yamazaki Zipper Archive |
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