Extension Description Parsed Indexed Statistics Yes PI .conf Configuration file (not to be used in FTPspace) .crumb Page Layout crumb navigation .crxCRX (.crx) Package Format

CRX files are ZIP files with a special header and the .crx file extension.

.csv Comma Separated Value .dat Data .dtd Document Type Definition .ear Enterprise ARchive ear (file format) used by Java ee for packaging modules into a single archive for eased deployment .graphic Page Layout graphic navigation Yes .htaccess Apache configuration .htgroup Apache configuration access group .htm HTML (deprecated) Yes PI .html HTML non-parsed Yes PI .htpasswd Apache configuration access password .jsp Java Servlet Page (only on KIT servers) PI .js JavaScript .local Page Layout local navigation .m3u mp3 playlist No No .metric CD-ROM statistics generation file AT .nav Nav 4/5 navigation (deprecated) .opml structured list of available feeds with associated metadata .page Page Layout page (not for general use) Yes .pl Perl script PI .ppc File required to host Macromedia Director Plug-Ins .ram RealMedia pointer (non-embedded redirection) .rdf Resource Description Framework metadata .rp Real pix .rpm RealMedia pointer (embedded redirection) .rt Real text .rtf Rich Text Format DL .section Page Layout section file Yes .shtml HTML page parsed Yes Yes PI .sid MrSID (Multi-resolution Seamless Image Database) .site Page Layout site definition Yes .smil SMIL .ssi Server Side Include .sssi Server-parsed Server Side Include Yes .tmpl Template .tvhtml Web on TV page Yes Yes PI .tvssi Web on TV Server Side Include Yes .txt Text .vbs VBScript (only to be used by teams to provide 'generic' plugin scripts, e.g. /cs/jst/mod/1 (iF&L) or /ssitools/etc (NM)) .vrml Virtual Reality Modelling Language .w32 File required to host Macromedia Director Plug-Ins .wml Wireless Markup Language Yes PI .wmls Wireless Markup Language script .wotv Web on TV configuration Yes .xml XML .xsl XSLT stylesheet .xslt XSLT stylesheet (deprecated) MIME TYPES 2.2.3. Default MIME types are configured in Apache in a configuration file, usually mime types. Extension Description MIME Type Searched Statistics .asf Windows media video/x-ms-asf SM .avi AVI video video/x-msvideo DL .bin MacOS archive application/octet-stream DL .chm Ms Help application/mshelp .class Java applet application/octet-stream .dcr Macromedia Shockwave application/x-director .dir Macromedia Shockwave application/x-director .doc Microsoft Word application/msword DL .dxr Macromedia Shockwave application/x-director .exe Executable (deprecated, except for foreign-language font downloads) application/octet-stream DL .eps Encapsulated postcript – for branding usage application/postscript .flv Flashvideo video/x-flv No No .gif Compuserve GIF image image/gif .gz Unix archive application/x-gzip DL .hlp Ms Help application/mshelp .hqx MacOS archive application/mac-binhex40 DL .ico Icon (used for bookmarks) image/x-icon .ipx IPIX application/x-ipix .ips IPIX script application/x-ipscript .jad Java file (for mobile phones) text/vnd.sun.j2me.app-descriptor .jar Java archive application/java-archive .jpg JPEG image image/jpeg .mid MIDI music audio/midi .mov QuickTime movie video/quicktime DL .mp3 MP3 audio audio/mpeg DL .mpg MPEG video/mpeg DL .msi Microsoft installer file application/x-msdownload DL .ogg Ogg Vorbis audio application/x-ogg .pdf Adobe Portable Document application/pdf DL .png PNG image image/png .ppt Microsoft Powerpoint application/vnd.ms-powerpoint DL .qt QuickTime movie video/quicktime DL .ra Real Media (audio-only live stream, deprecated for pre-recorded audio-only content) audio/x-pn-realaudio SM .rm Real Media (audio or video) audio/x-pn-realaudio SM .sis Sybian install file (mobile) application/vnd.symbian.install .sit Stuffit archive application/x-stuffit DL .swf Macromedia Flash application/x-shockwave-flash .tpg binary-encoded representations of TPEG-ML application/octet-stream .tgz Unix archive application/x-tar DL .wav Audio audio/x-wav DL .wbmp Wireless bitmap image/vnd.wap.wbmp .wma Windows Media Audio audio/x-ms-wma SM, DL .wrl 3D plugin file model/x3d .xls Microsoft Excel application/vnd.ms-excel DL .zip Zip archive application/zip DL .zook CBBC application files application/octet-stream 3. File extensions for news.bbc.co.uk 3.1. Text files 3.1.1. The following extensions MUST be used for text files. When using FTP these files SHOULD be uploaded in ASCII. 3.1.2. Files with extensions marked as Parsed are parsed by Apache. 3.1.3. Files with extensions marked as Indexed are indexed for search purposes. 3.1.4. Files with extensions marked as Statistics are considered as valid page impressions for the purpose of reporting usage (as defined by ABCe). Extension Description Parsed Indexed Statistics .css (as for www.bbc.co.uk) .form ssi for forms for votes and quizzes Yes .inc Parsed ssi Yes .js (as for www.bbc.co.uk) .plist Data file for legacy quizzes (deprecated) .ram (as for www.bbc.co.uk) .result ssi for results for votes .rpm (as for www.bbc.co.uk) .smil (as for www.bbc.co.uk) .stm 'News Interactive' page Yes PI .txt (as for www.bbc.co.uk) .xml (as for www.bbc.co.uk) Top of page Below files only for use on application or Dedicated servers Extension Description Parsed Indexed Statistics .config data file for votes .dat text file for syndication (dedicated servers) .form ssi for forms for votes and quizzes Yes .form_tplt template for votes .pl (as for www.bbc.co.uk) .qdata data file for quizzes .result ssi for results for votes .result_tplt template for results 3.2. Binary files 3.2.1. The following extensions MUST be used for binary files. When using FTP these files MUST be uploaded in binary mode. 3.2.2. Files with extensions marked as Statistics are considered as valid page impressions for the purpose of reporting usage (as defined by ABCe). 3.2.3. Default MIME types are configured in Apache in a configuration file, usually mime types. Extension Description MIME Type Searched Statistics .class (as for www.bbc.co.uk) (as for www.bbc.co.uk) .dcr Macromedia Shockwave application/x-director .exe Autonomy search wrappers (deprecated) (as for www.bbc.co.uk) .gif (as for www.bbc.co.uk) (as for www.bbc.co.uk) .jpg (as for www.bbc.co.uk) (as for www.bbc.co.uk) .mov (as for www.bbc.co.uk) (as for www.bbc.co.uk) .pdf (as for www.bbc.co.uk) (as for www.bbc.co.uk) .swf Macromedia Flash (as for www.bbc.co.uk) A2b online delivery company owned by AT&T, serves up audio in a proprietary format based on MPEG-2 AAC, including copyright protection technology AAC (MPEG-2 Advanced Audio Coding) aac state of the art mpeg natural audio coding; includes three profiles, delivers better sound quality at 96kps than MPEG layer2 at 192kps. Previously known as mpeg-2 nbc.

AC-2 (Audio Code 3) a multichannel music compression technology developed by Dolby Laboratories, primarily for cinema. Branched out to laserdisc and DVD, now known as Dolby Digital. ADPCM (Adaptive Differential Pulse Code Modulation compression technique that encodes predictive residual instead of original waveform signal so the compression efficiency is improved by a predictive gain. Rather than transmitting PCM samples directly, the difference between the estimate of the next sample and the actual sample is transmitted, which is usually small and therefore can be encoded in fewer bits than the sample itself.

Alias mirrored signal component resulting from sampling ATRAC (Adaptive Transform Acoustic Coding) lossy audio codec system based on pyschoacoustic principles; compresses CD audio to approximately 1/5 of original data rate with virtually no loss in sound quality; the encoding scheme used in MiniDisc.

http://www.mp3-tech.org/">Glossary - MP3'Tech 3gp is a mutltimedia container formated defined by the 3gpp for 3g UMTS multimdedia services. Used on 3G mobile phones but suppors 2G and 4G as well.

3GP
Filename Extension.3gp
Internet media typevideo/3gpp, audio/3gpp
Developed by3GPP
Type of formatmedia container
Container foraudio, video, text
Extended fromMPEG-4 Part 12
3GP
Filename Extension.3g2
Internet media typevideo/3gpp2, audio/3gpp2
Developed by3GPP2
Type of formatmedia container
Container foraudio, video, text
Extended fromMPEG-4 Part 12
3GPP2 File Format">3gpp2 is a multimedia container format defined by the 3gpp2 for 3G CDMA2000 multimedia services; very similat to 3gp file format, but has extensions as well as limitations 3GP does not.

http://www.3gpp.org/ftp/Specs/html-info/26-series.htm"> The 3rd Generation Partnership Project (3GPP) unites [Six] telecommunications standard development organizations (ARIB, ATIS, CCSA, ETSI, TTA, TTC), known as “Organizational Partners” and provides their members with a stable environment to produce the highly successful Reports and Specifications that define 3GPP technologies. The Four Technical Specification Groups (TSG) in 3GPP are Radio Access Networks (RAN), Service & Systems Aspects (SA), Core Network & Terminals (CT) and GSM EDGE Radio Access Networks (GERAN). Each of the four TSGs has a set of Working Groups, which meet regularly four to six times a year. Each TSG has its own quarterly Plenary meeting where the work from its WGs is presented for information, discussion and approval. Each TSG has a particular area of responsibility for the Reports and Specifications within its own Terms of Reference (Details available in the Specification Groups pages). 3GPP - A Global Initiative 3GPP The Mobile Broadband Standard 3gpp2-file-formats-for-multimedia-services-3ggp2-3rd-generational-project-2-2007-05-18 http://www.3gpp.org/ftp/Specs/html-info/26-series.htm">3GPP Specification series"> http://www.3gpp.org/ftp/Specs/html-info/26244.htm">3GPP Specification Detail http://www.3gpp2.org/Public_html/specs/index.cfm">3GPP2 Published Document Library Technical Specification Groups">tsgs Long Term Evolution">lte

.hlp

Microsoft WinHelp .hlp is a proprietary format for online help files that can be displayed by the Microsoft Help browser winhelp.exe or winhlp32.exe. The file format is based on Rich Text Format (rtf). It remained a popular Help platform from Windows 3.0 platform through Windows XP. WinHelp was removed in Windows Vista to discourage software developers from using the obsolete format and encourage use of newer help formats.

.res

A Windows resource file (.RES) contains a series of packed resource entries, with no other structure, that is no headers, footers, padding, etc. The format of a resource entry is different for Windows 3.x (16-bit) and Win32, that is, Windows 95 and Windows NT (32-bit).

.reg

.reg file format is used by RegEdit, the program supplied with Windows 3.x, Windows 95, and Windows NT, to import and export settings from the registry.

.mdb, a file-extension used in certain versions of Microsoft Access databases File extensions Microsoft Access saves information under the following file formats: File format Extension .adeMS Access Data Project (not supported in Access 2013) Access Data Project (not supported in Access 2013) .adp Access Blank Project Template .adn Access Database (2007) .accdb Access Database Runtime (2007) .accdr Access Database Template (2007) .accdt Access Database (2003 and earlier) .mdb Access Database, used for addins (2,95,97), previously used for workgroups (2). .mda Access Blank Database Template (2003 and earlier) .mdn Access Add-in Data (2003 and earlier) .mdt Access Workgroup, database for user-level security. .mdw Access (SQL Server) detached database (2000) .mdf Protected Access Database, with compiled VBA (2003 and earlier) .mde Protected Access Database, with compiled VBA (2007) .accde Windows Shortcut: Access Macro .mam Windows Shortcut: Access Query .maq Windows Shortcut: Access Report .mar Windows Shortcut: Access Table .mat Windows Shortcut: Access Form .maf Access lock files .ldb Microsoft Access saves information under the following file formats: File format Extension Protected Access Data Project (not supported in Access 2013) .ade Access Data Project (not supported in Access 2013) .adp Access Blank Project Template .adn Access Database (2007) .accdb Access Database Runtime (2007) .accdr Access Database Template (2007) .accdt Access Database (2003 and earlier) .mdb Access Database, used for addins (2,95,97), previously used for workgroups (2). .mda Access Blank Database Template (2003 and earlier) .mdn Access Add-in Data (2003 and earlier) .mdt Access Workgroup, database for user-level security. .mdw Access (SQL Server) detached database (2000) .mdf Protected Access Database, with compiled VBA (2003 and earlier) .mde Protected Access Database, with compiled VBA (2007) .accde Windows Shortcut: Access Macro .mam Windows Shortcut: Access Query .maq Windows Shortcut: Access Report .mar Windows Shortcut: Access Table .mat Windows Shortcut: Access Form .maf Access lock files .ldb Word[edit] Legacy Legacy filename extensions denote binary Microsoft Word formats that are deprecated with the release of Microsoft Office 2007. Although the latest version of Microsoft Word can still open them, they are no longer developed. Legacy filename extensions include: doc – Legacy Word document; Microsoft Office refers to them as "Microsoft Word 97 - 2003 Document" dot – Legacy Word templates; officially designated "Microsoft Word 97 - 2003 Template" OOXML Office Open XML (OOXML) format was introduced with Microsoft Office 2007 and became the default format of Microsoft Word ever since. Pertaining file extensions include: docx – Word document docm – Word macro-enabled document; same as docx, but may contain macros and scripts dotx – Word template dotm – Word macro-enabled template; same as dotx, but may contain macros and scripts Excel[edit] Legacy Legacy filename extensions denote binary Microsoft Excel formats that are deprecated with the release of Microsoft Office 2007. Although the latest version of Microsoft Excel can still open them, they are no longer developed. Legacy filename extensions include: xls – Legacy Excel worksheets; officially designated "Microsoft Excel 97-2003 Worksheet" xlt – Legacy Excel templates; officially designated "Microsoft Excel 97-2003 Template" xlm – Excel macro OOXML Office Open XML (OOXML) format was introduced with Microsoft Office 2007 and became the default format of Microsoft Excel ever since. Excel-related file extensions of this format include: xlsx – Excel workbook xlsm – Excel macro-enabled workbook; same as xlsx but may contain macros and scripts xltx – Excel template xltm – Excel macro-enabled template; same as xltx but may contain macros and scripts Other formats Microsoft Excel uses dedicated file format that are not part of OOXML and use the following extensions: xlsb – Excel binary worksheet (BIFF12) xla – Excel add-in or macro xlam – Excel add-in xll – Excel XLL add-in; a form of DLL-based add-in[1] xlw – Excel workspace; previously known as "workbook" PowerPoint[edit] Legacy ppt – Legacy PowerPoint presentation pps – Legacy PowerPoint slideshow OOXML pptx – PowerPoint presentation pptm – PowerPoint macro-enabled presentation potx – PowerPoint template potm – PowerPoint macro-enabled template ppam – PowerPoint add-In ppsx – PowerPoint slideshow ppsm – PowerPoint macro-enabled slideshow sldx – PowerPoint slide sldm – PowerPoint macro-enabled slide Access[edit] Microsoft Access 2007 introduces a few new file extensions: ACCDB – The file extension for the new Office Access 2007 file format. This takes the place of the MDB file extension. ACCDE – The file extension for Office Access 2007 files that are in "execute only" mode. ACCDE files have all Visual Basic for Applications (VBA) source code hidden. A user of an ACCDE file can only execute VBA code, but not view or modify it. ACCDE takes the place of the MDE file extension. ACCDT – The file extension for Access Database Templates. ACCDR – is a new file extension that enables you to open a database in runtime mode. By simply changing a database's file extension from .accdb to .accdr, you can create a "locked-down" version of your Office Access database. You can change the file extension back to .accdb to restore full functionality. Other[edit] thmx – Microsoft Office theme file http://php.net/manual/en/intro.phar.php">.phar (php Archive File Format http://www.wotsit.org/"> GET FILE FORMATS
FLAC:
Free Lossless Audio Codec. Lossless audio format. duh.
MP3
MPEG-1 layer 3.
Lossy audio format.
strengths of MP3 format. It contains audio in compressed form, so the files are smaller (or much smaller) than originals. As a result, you can take more music on the same media.
econd strength of MP3. Nowadays this format is supported virtually by anything. I don't know (and don't care) about toasters that are able to play MP3 files, but most other things are aware of the format. CD-walkmans, home stereos, DVD players, iPods, computers, of course. Audio in MP3 format is highly compatible, because MP3 format itself is well-established on the market.

Lossless vs. Lossy Formats

Lossless: means it loses no audio information from it's original source, it is just compressed and can be returned to its original state at any time.

FLAC stands for Free Lossless Audio Codec. Lossless means that no quality is lost while converting to this format. In contrast, MP3 (MPEG-1 layer 3) is a lossy format, which means that you lose some original quality while converting to it.