File extension Details of VDI, VCD, VCD, VC4, VHD, HDD, VAPORCD, UIBAK, UIF

Name:	VDI
File Type:	VirtualBox Virtual Disk Image
Popularity:	3
Category:	disk
File Description:	Virtual drive format used by Sun Microsystems xVM VirtualBox, an open-source desktop virtualization program; can be mounted as a hard disk on Mac, Windows, and Unix platforms; allows users to run programs written for different operating systems in a high-speed virtual environment. Sun Microsystems acquired xVM VirtualBox from innotek in early 2008.
Open Programs:	Mac OS Sun Microsystems xVM VirtualBox Windows Sun Microsystems xVM VirtualBox Linux Sun Microsystems xVM VirtualBox

Name:	VCD
File Type:	Virtual CD   (Most common)
Popularity:	5
Category:	disk
File Description:	Disc image of a CD or DVD; recognized by Windows as an actual disc, even though the data is on the hard drive; allows CDs and DVDs to be used without requiring physical drives; useful for mounting discs on network computers.
Open Programs:	Windows H+H Software Virtual CD Roxio Easy Media Creator

Name:	VCD
File Type:	FarStone Virtual Drive
Popularity:	3
Category:	disk
File Description:	Copy of a CD or unprotected DVD saved as a compressed image, or virtual disc; can be run in place of the original disc in any one of up to 23 virtual drives
Open Programs:	Windows FarStone VirtualDrive EZB Systems UltraISO

Name:	VC4
File Type:	Virtual CD Disk Image   (Most common)
Popularity:	3
Category:	disk
File Description:	Exact copy (image) of a CD-ROM, stored as a file on the hard disk; can be used to run CD-based programs without inserting the physical CD; common disc image format recognized by several disc authoring programs.
Open Programs:	Windows H+H Software Virtual CD Smart Projects IsoBuster EZB Systems UltraISO MagicISO

Name:	VHD
File Type:	Virtual PC Virtual Hard Disk   (Most common)
Popularity:	3
Category:	disk
File Description:	Hard disk image file used by Microsoft Virtual PC; stores data within a single file that acts as an individual hard disk; may be used to install multiple operating systems on a single computer, test software programs, or run older applications. The VHD Image Format Specification has been available as a royalty-free license since June, 2005.
Open Programs:	Windows Microsoft Virtual PC or Virtual Server

Name:	HDD
File Type:	Parallels Desktop Hard Disk File
Popularity:	3
Category:	disk
File Description:	Virtual hard disk created with Parallels Desktop, a program that allows Windows and other operating systems to run on a Mac; saves all the data for the system in a virtual disk that can only be read by Parallels Desktop software. Examples of virtual hard disk files include "app.hdd," "data.hdd," and "swap.hdd;" these three virtual disks may be used to create a "virtual appliance."
Open Programs:	Mac OS Parallels Desktop

Name:	VAPORCD
File Type:	Norum Vapor CD
Popularity:	3
Category:	disk
File Description:	CD-ROM disc image created using Norum Vapor disc imaging software
Open Programs:	Windows Norum Vapor EZB Systems UltraISO MagicISO

Name:	UIBAK
File Type:	UltraISO Backup Disk Image
Popularity:	3
Category:	disk
File Description:	Backup of an .ISO disk image saved with UltraISO; may be used to recover a disk image if the original file becomes corrupted or is deleted; typically named "[filename].iso.uibak" and can be opened by removing the "uibak" part of the extension. UIBAK files may be created automatically, depending on the program's settings; to change UltraISO's backup configuration, first select Options->Configuration, then click the "Save" tab to view the file saving options.
Open Programs:	Windows EZB Systems UltraISO

Name:	UIF
File Type:	Universal Image Format Disc Image
Popularity:	3
Category:	disk
File Description:	Compressed disc image format created by MagicISO, a program for creating, editing, and extracting disc image files; can be encrypted and password-protected; also supports backing up multi-session CD/DVD, Audio-CD, VCD, SVCD, and DVD-Video formats.
Open Programs:	Mac OS UIF2ISO for Mac Windows MagicISO PowerISO 4.1 or later UIF to ISO Converter UIF2ISO Linux UIF2ISO

Name:	CSO
File Type:	Compressed ISO Disk Image
Popularity:	3
Category:	disk
File Description:	Compressed .ISO disk image format used for archiving PlayStation Portable (PSP) games; may include up to nine levels of compression, but higher amounts of compression may cause the disk image to load slowly.
Open Programs:	Mac OS Prometeus Windows UMDGen CiSO Converter PSP ISO Compressor