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File extension Details of XMCDZ, XEZ, XX, XEF, XPI, QDA, F, FDP, VSI

Name:XMCDZ
File Type:Mathcad Compressed Worksheet File
Popularity:3
Category:compressed
File Description:XML-based worksheet created with Mathcad, a program for creating engineering and scientific calculations; may include both mathematical and textual elements; similar to a .XMCD file, but saved in a compressed format.
Open Programs: Windows PTC Mathcad
Name:XEZ
File Type:eManager Template Package
Popularity:3
Category:compressed
File Description:Compressed package of templates use by eManager, a modular system for procedures and quality and risk control; contains XML and graphics
Open Programs: Windows X-Genics eManager
Name:XX
File Type:XXEncoded File
Popularity:2
Category:compressed
File Description:7-bit ASCII text file encoded with XX encoding (XXEncoding), an encoding method that uses only alphanumeric characters, and the plus and minus signs.

XXEncoding was originally developed as a means to transfer files without them being corrupted, similar to UUEncoded (.UU) files; however, the format is seldom used today since most programs now support binary file transfers and do not require files to be encoded.

XXEncoded files may also use the .XXE file extension.
Open Programs: Windows ConeXware PowerArchiver
Corel WinZip
Acubix PicoZip
Name:XEF
File Type:WinAce Encrypted File
Popularity:3
Category:compressed
File Description:File encrypted with WinAce encryption; may be encrypted using one of eight different encryption methods
Open Programs: Mac OS MacUnace
Windows WinAce
Name:XPI
File Type:Mozilla Installer Package
Popularity:3
Category:compressed
File Description:Compressed installation archive that contains the main components installed with Firefox and Mozilla Web browsers; installed by Mozilla installer script; also used for installing Web browser extensions.

XPI files may often be installed by simply dragging and dropping the file onto an open Web browser window.
Open Programs: Mac OS XPInstall (included with Mozilla or Firefox) Windows XPInstall (included with Mozilla or Firefox)
Name:QDA
File Type:Quadruple D Archive
Popularity:3
Category:compressed
File Description:Compressed archive created with Quadruple D (Do the DirectDraw with Delphi); part of a DirectX graphics library that is commonly used Japanese PC games written in Delphi; includes the Quadruple D Archiver for creating and opening QDA archives.
Open Programs: Windows Quadruple D Archiver
Name:F
File Type:Freeze Compressed File
Popularity:3
Category:compressed
File Description:Unix file archive compressed with the "freeze" file compression program; part of the freeze/melt/fcat compression utilities package; has mostly been replaced by the GNU zip suite that includes gzip, gunzip, and zcat.
Open Programs: Windows ZipZag
Linux freeze
Name:FDP
File Type:MySafe Encrypted Data
Popularity:3
Category:compressed
File Description:Encrypted file or folder used to protect important files; only accessible using fingerprint reader authentication
Open Programs: Windows UPEK Protector Suite QL
Name:VSI
File Type:Visual Studio Content Installer File
Popularity:3
Category:compressed
File Description:Visual Studio installation package that may contain starter kits, item templates, controls, code snippets, add-ins, or other types of files; used for exchanging Visual Studio content within the developer community; also referred to as a "community component."

Visual Studio content installation packages are compressed using ZIP compression; they are similar to .ZIP files, but use the ".vsi" extension instead; VSI files can be created and signed using the MakeZipExe program.
Open Programs: Windows Microsoft Visual Studio Content Installer
Name:ZOO
File Type:Zoo Compressed File   (Most common)
Popularity:3
Category:compressed
File Description:Old compression format used on Unix systems; based on the Lempel-Ziv compression algorithm and reduces file size between 20 and 80 percent, depending on the file type; later replaced by .ARC compression.
Open Programs: Mac OS MacZoo
MacBooz
Windows ALTools ALZip
WinAce
Linux zoo

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