Collector: Nosa Lee
Original Address: https://www.seeksunslowly.com/file-extensions-types-references-q
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Now, I collected all the known file extensions/types for your reference, I grouped them according to the first character due to there are too many file extensions/types.

The following file extensions/types are grouped as Q*, to refer to more file extensions/types or download them (a compressed txt file that separates the extension and description with ” : “), please click the following links.

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Number  Symbol

Download All File Types/Extensions in ONE Compressed File

Q   Win95 Fax Queue
Q   Quantum Compressed Archive (Cinematronics)
Q   Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
Q0   Q0 Graphic
Q00   Quicken 2000 File (Intuit Inc.)
Q01   Quicken 2001 File (Intuit Inc.)
Q03   QuickTax Year 2003 Return (Intuit Canada)
Q04   QuickTax Year 2004 Return (Intuit Canada)
Q1   Winamp Equalizer Settings (Nullsoft)
Q1A   QuickClean Restore Point (Network Associates Technology, Inc.)
Q1Q   LunarCell Plug-in File
Q1Q   LunarCell Photoshop/Paint Shop Pro Plug-In (Flaming Pear Software)
Q2   Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
Q2Q   Flexify Photoshop/Paint Shop Pro Plug-In (Flaming Pear Software)
Q3D   Quickdraw 3D File
Q3D   Quest3D Interactive 3D File (Act-3D B.V.)
Q3O   Quick3D Model
Q3X   QuickTime QuickDraw 3D Extension (Apple Inc.)
Q4Q   Solar Cell Photoshop/Paint Shop Pro Plug-In (Flaming Pear Software)
Q4W   Qualitek-4 Data File (Nutek, Inc.)
Q5Q   SuperBladePro Preset
Q5R   Melancholytron Photoshop/Paint Shop Pro Plug-In (Flaming Pear Software)
Q7Q   India Ink Photoshop/Paint Shop Pro Plug-In (Flaming Pear Software)
Q8R   Flood Photoshop/Paint Shop Pro Plug-In (Flaming Pear Software)
Q98   Quicken 98 File (Intuit Inc.)
Q99   Quicken 99 File (Intuit Inc.)
Q9Q   BladePro Graphic Plug-in File
Q9R   Glitterato Photoshop/Paint Shop Pro Plug-In (Flaming Pear Software)
Q9S   Mr. Contrast Photoshop/Paint Shop Pro Plug-In (Flaming Pear Software)
QAA   WinQSB Data Input File (John Wiley & Sons, Inc.)
QAB   QABUTIL File
QAB   SYBYL Binary Field Files
QAD   PF QuickArt Document
QAD   WordPerfect PerfectFit QuickArt NameSpace .WPG Thumbnail (Corel Corporation)
QAG   Norton Desktop Quick Access Group
QAP   Omnis Quartz Application File
QAT   Office Quick Access Toolbar Info (Microsoft Corporation)
QAX   ExpressTracker Data File
QB   Tony Hawk’s Pro Skater Script (Neversoft Entertainment)
QB   MicroCase QBank (Cengage Learning)
QB   Q-Builder Study Cards File (Q-Builder Technology, Inc.)
QB1   Quicken (Intuit Inc.)
QBA   QuickBooks Accountant’s Copy File (Intuit, Inc.)
QBB   QuickBooks Backup File (Intuit, Inc.)
QBC   qDos Batch File (Q-Base Team)
QBD   Keyboard Layout
QBD   Win3 Quicken File
QBE   Quattro Pro Saved Query
QBE   dBASE IV Saved Query
QBE   Example Query
QBF   QuickBASIC Font File
QBI   QuickBooks Crash Roll Back File (Intuit, Inc.)
QBL   Business Lawyer Document
QBM   QuickBooks Portable Company File (Intuit Inc.)
QBO   dBASE IV Ordered Query
QBS   Quick Basic Program File (Microsoft Corporation)
QBW   Quicken (Intuit Inc.)
QBW   QuickBooks Primary Data File (Intuit, Inc.)
QBX   QuickBooks Accountant Transfer File (Intuit Inc.)
QC   Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
QC   Steam Source SDK Model Source File (Valve Corporation)
QC   Progress Results Configuration (Progress Software Corporation)
QC   Quake-C Source Code File (id Software)
QCB   Combat Flight Simulator Quick Combat Editor File (Microsoft Corporation)
QCB   QConBridge
QCC   QUCM Firmware Upgrade
QCC   QC-CALC File
QCD   QuarkCopyDesk SE
QCD   Cliq Accessories Phonebook Data
QCE   QuickCrypto Encrypted File (Cybernescence)
QCF   QuickLogic Constraint File
QCF   Miliki Super Compressor Pro QuikCAT Compressed File (QuikCAT Technologies)
QCF   QuickBASIC Coordinates File
QCF   Q-emuLator
QCH   SSI Dark Queen of Krynn File
QCH   Quicken DOS ver 2 Data File (Intuit Inc.)
QCI   Massively Parallel Quantum Chemistry Program File
QCI   Cliq Accessories Phonebook Index
QCK   QuickCard File
QCK   Jigsaw 2 Astrological Tool File
QCK   Quick Charts File
QCK   Quick Foram Count File
QCK   VAX CRYSTALS Chemical Crystallogaphy File
QCM   3164 Emulator Quick Command File
QCM   QUCM Application File
QCP   PureVoice File (Qualcomm)
QCS   CADQC Standard File
QCT   Memory-Map File
QD   SHARP MZ-series Emulator File
QD0   Omnis Quartz Data File Segment 10
QD1   Omnis Quartz Data File Segment 10
QD2   Omnis Quartz Data File Segment 2
QD3   Omnis Quartz Data File Segment 3
QD3   QuickDraw 3D Metafile
QD3D   QuickDraw 3D Metafile
QD4   Omnis Quartz Data File Segment 4
QD5   Omnis Quartz Data File Segment 5
QD6   Omnis Quartz Data File Segment 6
QD7   Omnis Quartz Data File Segment 7
QD8   Omnis Quartz Data File Segment 8
QD9   Omnis Quartz Data File Segment 9
QDA   KaleidaGraph Data File (Synergy Software)
QDA   Quadruple D Archive
QDAT   QuickTime Installer Cache (Apple Inc.)
QDAUX   Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
QDB   Quicken Data File Backup (Intuit Inc.)
QDB   CUEcards (Marcus Humann)
QDC   Quick Devis Data (Quotalys Ltd)
QDE   qDos Executable (Q-Base Team)
QDF   Snapform Form Document (Ringler Informatik AG)
QDF   Label Matrix Bar Code Label (Teklynx Software Solutions)
QDF   Quicken Windows Data File (Intuit Inc.)
QDI   Dictionary
QDI   Quicken Data File (Intuit Inc.)
QDK   Quarterdeck QEMM File
QDP   KaleidaGraph Plot File (Synergy Software)
QDP   MPQDraft Plug-in
QDT   QuickBooks UK Accountancy Data File (Intuit, Inc.)
QDT   Quicken Data File (Intuit Inc.)
QDT   Question Mark Desigener Test File
QDT   QuarkXpress Dictionary File (Quark, Inc.)
QDV   Random Dot Software QDV Graphic
QDV   Steve Blackstock Giffer Graphics File
QE4   Kingpin Project File
QEF   Excel Query (Microsoft Corporation)
QEL   Quicken Electronic Library File (Intuit Inc.)
QEM   Expensable Report
QEP   IRMA Wordstation for Windows
QES   EpiData Questionnaire File (EpiData Association)
QEX   ExpensAble Data File
QF   Query Filter
QF   FORTRAN Embedded QUEL
QF   Qompose HTML Template (Wade Bowmer)
QF   Dispatch Qantas Itinerary Manager Timetable Export File (Scott Andrew Borton)
QFC   QuickFileCollection Archive
QFD   Quicken (Intuit Inc.)
QFG   Quicken (Intuit Inc.)
QFI   Quicken 2002 File (Intuit Inc.)
QFI   QuickTime Image (Apple Inc.)
QFL   Family Lawyer Document
QFN   QuickTime Font File (Apple Inc.)
QFS   Need for Speed Compressed Image (Electronic Arts, Inc.)
QFX   Quicken Transfer File (Intuit Inc.)
QFX   Quick Link/Quick Link II Fax
QHD   ViewChoice (Payroll Associates, LLC)
QHF   QIP Infium Instant Messenger History File (QIP Designers)
QIC   Windows Backup Backup Set (Microsoft Corporation)
QID   Quicken (Intuit Inc.)
QIF   Quicken Interchange Format (Intuit Inc.)
QIF   DESQview Compressed Font Archive (Symantec Corporation)
QIF   QuickTime Image (Apple Inc.)
QIN   Quinnsoft MP3 Player Data File (Quinnsoft)
QIP   DESQview Compressed Program Archive (Symantec Corporation)
QIX   Quicken DOS ver 2 Data File (Intuit Inc.)
QIZ   Quizzical Test
QIZ   Minimouse’s Quiz File
QKT   Works (Microsoft Corporation)
QL   Progress Results Configuration (Progress Software Corporation)
QL$   MS Compressed QLB
QLB   C and QuickBasic-DOS and Visual Basic Quick Library (Microsoft Corporation)
QLC   PostScript Help File
QLC   Type Manager ATM Type 1 Font Script (Adobe Systems Incorporated)
QLE   QOOLE
QLF   Family Tree Maker Genealogy File
QLGENERATOR   OS X 10.5 Quick Look Generator File (Apple Inc.)
QLI   Statler Stitcher (Gammill, Inc.)
QLP   QuickLink Printer Driver
QM   Qt Message File (Qt Software)
QM   Quality Motion Streaming Video File (KDDI R&D Labs. Inc.)
QM2   Dragon Raja Character File (E-Sofnet Products, Inc.)
QM4   QMail Mail Door Option or Services File
QMA   Qedit File
QMD   Quicken Windows ver 5, 6 Data File (Intuit Inc.)
QME   Win3 Quicken Windows File
QMF   Lotus Approach Database Query
QML   Quicken DOS ver 2 Data File (Intuit Inc.)
QMO   ChemetriQ Inspection System Stored Qcept Metrology Objects (Qcept Technologies Inc.)
QMP   SeeYou Raster Maps (Naviter)
QMR   OzWin CompuServe E-mail/Forum Access Quickscan History
QMT   Quicken Memory List (Intuit Inc.)
QMX   Quantum Streaming Video Stream Control File (Move Networks, Inc.)
QN2   QuickNote File
QNA   High ASCII Quake Name Maker
QNC   Cliq Accessories Notepad Customization
QND   Cliq Accessories Notepad Data
QNE   Organize Quick and Easy (Individual Software Inc.)
QNI   Cliq Accessories Notepad Index
QNM   High ASCII Quake Name Maker
QNT   Chromeleon Quantification Method
QNX   Quicken Index (Intuit Inc.)
QOS   Notes Full Text Index (IBM)
QP03   qpress qpress Compressed Archive
QPB   Quicken Payroll File (Intuit Inc.)
QPC   KaleidaGraph Plot File (Synergy Software)
QPD   QP Software Dynamic Plug-in
QPD   Win3 Quicken Windows File
QPD   Qualified Plan Distribution and Tax Analysis System (QPDS) (DATAIR Employee Benefit Systems, Inc.)
QPF   Quartus II Project File (Altera Corporation)
QPH   Quicken Price History File (Intuit Inc.)
QPI   Win3 Quicken File
QPL   KaleidaGraph Layout File (Synergy Software)
QPP   QPresenter & Qpresenter Pro Presentation File (Digital Image LLP)
QPR   Foxpro Relational Query (Microsoft Corporation)
QPR   OS/2 Printer Queue Driver
QPR   Dinkum Embedded C++ Abridged Library
QPS   QP Software Application File
QPW   Quattro Pro Project File (Corel Corporation)
QPX   QuickTime Player Plug-in (Apple Inc.)
QPX   Foxpro Ordered Query (Microsoft Corporation)
QQT   Quick Qard Technology Qardware Definition File
QR2   Delphi Database Quick Report File (Borland Software Corporation)
QRC   Qt Resource Collection File (Qt Software)
QRD   BI/Query Query Result
QRF   Questions-R閜onses Quiz File (Thomas and Mathieu DUABELE)
QRF   QR Designer Form File (PJ Applications)
QRM   Qworum Message (Armangil Software)
QRP   Dosh Software File
QRP   Gupta Report Builder File
QRP   QuickReport Report (QuSoft)
QRP   DR Hardware File
QRP   COW2000 Report (Software Exception)
QRP   Liberty for Windows Report File
QRS   WordPerfect Equation Editor (Corel Corporation)
QRS   SlickRun MagicWord Pack (Bayden Systems)
QRT   QRT Ray Tracing Graphic
QRT   QR Designer Form Project File (PJ Applications)
QRT   QuickRoute
QRY   Query
QRY   Query (Microsoft Corporation)
QRY   Lotus Approach Query for SQL Tables
QRY   dBASE IV Query
QRY   BI/Query Query
QS9   OzWin CompuServe E-mail/Forum Access Scan Result File
QSA   Encrypted QSA Specifications Database Export File
QSC   KaleidaGraph Script File (Synergy Software)
QSC   Pxyl Visuals Chart
QSD   Quicken Windows Data File (Intuit Inc.)
QSF   Quintessential Player Family Skin (Quinnware)
QSF   Millennium 3 Quick Start File
QSF   Micrografx QuickSilver Compressed Internet Live Graphic
QSG   Quest Saved Game (Axe Software)
QSK   Quintessential Player Skin (Quinnware)
QSL   OzWin CompuServe E-mail/Forum Access Forum Quickscan List
QSL   Questionnaire Specification Language File
QSM   QuadriSpace Model Format File
QSN   TAPCIS QuickScan Data
QSPLUGIN   Quicksilver Plug-in (Blacktree, Inc.)
QSS   Quantum Streaming Video Stream Segment (Move Networks, Inc.)
QST   Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
QST   Ami Pro QuickStart Tutorial Image (IBM)
QST   Zelda Classic Quest (Armageddon Games)
QST   Quake Spy Tab File
QST   KaleidaGraph Style File (Synergy Software)
QSV   Jigs@w Saved Puzzle State (Tibo Software)
QSXL   QuickLayout Session Data (Advanced Publishing Systems Pty Ltd)
QT   QuickTime Movie (Apple Inc.)
QT1   ViewChoice (Payroll Associates, LLC)
QT2   ViewChoice (Payroll Associates, LLC)
QTA   qtar Archive
QTC   Incite Media Assistant File
QTC   QuickTime Ver 2.0+ Windows CODEC (Apple Inc.)
QTCH   Quicktime Cached File (Apple Inc.)
QTE   Questionnaire Specification Language File
QTF   Qtracker Filter
QTI   QuickTime Image (Apple Inc.)
QTIF   QuickTime Image (Apple Inc.)
QTK   Apple Quicktake (Apple Inc.)
QTL   QuickTime Media Link (Apple Inc.)
QTL   YUV SECAM or PAL image
QTM   QuickTime Movie (Apple Inc.)
QTMP   Qtracker Mapshot Pack
QTN   Norman Virus Control Quarantine File (Norman)
QTP   QuickTime Preferences (Apple Inc.)
QTP   Astra Quicktest Report
QTPF   QuickTime PreFlight Text (Apple Inc.)
QTPP   Qtracker Program Package
QTR   QuickTime Resource File (Apple Inc.)
QTS   Macintosh PICT Image
QTS   QuickTime System File (Apple Inc.)
QTSCPT   Quicktime Script File (Apple Inc.)
QTSK   Qtracker Skin
QTV   QuickTime Virtual Reality Movie (Apple Inc.)
QTVR   QuickTime VR (Apple Inc.)
QTW   QText File
QTX   Quicken Data File (Intuit Inc.)
QTX   QuickTime Ver 3/4 Windows CODEC (Apple Inc.)
QTX   Qtext Text File
QTZ   QuaSZ Texture File (Mystic Fractal)
QTZ   Quartz Composer Data (Apple Inc.)
QUAD   QUAD Compressed Archive (Ilia Muraviev)
QUALIFY   Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
QUALITY   Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
QUB   Qubus (KPMG)
QUE   CuteFTP Queue File (GlobalSCAPE)
QUE   Interviewer Voxco Questionnaire (Voxco Inc.)
QUE   SurveySolutions Questionnaire (Perseus Development Corporation)
QUE   PDP-10 Print Queue, Submit Queue, Plot Queue
QUE   Sphinx Questionnaire (Le Sphinx D関eloppement)
QUE   Task Scheduler Queue Object
QUENTIN   Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
QUERY   PCHealth Query (Microsoft Corporation)
QUEST   Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
QUEST1   Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
QUEST2   Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
QUI   Brain Quiz File
QUICKDRAW   Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
QUICKEN   Quicken Spreadsheet (Intuit Inc.)
QUIT   Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
QUITFX   Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
QUOTE   Unknown Apple II File (found on Golden Orchard Apple II CD Rom)
QUP   QuickTime Update Package (Apple Inc.)
QUT   IBM Voice Type Language Vocabels File
QVD   Quaanta Media Desktop (GalaxyBeing.com)
QVM   Quake File
QVP   ViewletBuilder Project File (Qarbon, Inc.)
QVT   Quantum Streaming Video Stream URL (Move Networks, Inc.)
QVW   QlikView Document (QlikTech International AB.)
QW   Symantec Q&A Write Program File (Symantec Corporation)
QW5   Quicken 5 File (Intuit Inc.)
QW6   Quicken 6 File (Intuit Inc.)
QWB   Money Quotes WriteBack Import File (Microsoft Corporation)
QWK   QWK Reader Message
QWP   Quiptics Puzzle File
QX   Quexal Source Code (Stefano Tommesani)
QXB   QuarkXpress Books File (Quark, Inc.)
QXD   QuarkXpress Document (Quark, Inc.)
QXL   QuarkXpress Element Library (Quark, Inc.)
QXM   Quexal Macro (Stefano Tommesani)
QXP   QuickCreateXP Course Customiser (SanScrip)
QXP   QuarkXpress Project (Quark, Inc.)
QXT   QuarkXpress Template File (Quark, Inc.)
QZ   Create A Quiz Exam File (PC Shareware, Inc.)
QZB   Quizzical Test
QZB   QuaSZ Zbuffer File (Mystic Fractal)
QZD   QuizPro Quiz Data (Luzius Schneider)
QZE   QuizPro Quiz Data (Luzius Schneider)
QZM   QuizMaster File
QZS   QuizPro Quiz Data (Luzius Schneider)

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Download All File Types/Extensions in ONE Compressed File

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