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A flash memory format introduced in 1994 by SanDisk. At approximately 36x43x3mm, CompactFlash (CF) cards are much larger than the SD Cards used in most cameras; however, they are still used in digital SLRs, and many photographers find the larger size harder to misplace. CompactFlash supports both 3.3v and 5v circuits and can hold up to 512GB as of 2015.

Data transfer speeds are designated as multiples of the first CD-ROM rate of 150 KB/sec. For example, 1,000x = 150 MB/sec. See CD-ROM drives.

CF Cards Use the PC Card Interface
Type I CF cards are 3.3mm thick and commonly used for camera storage. Type II cards are 5mm thick and were previously used for miniature hard drives, modems and Ethernet. On earlier laptops, adapters enabled the 50-pin Type II CF card to plug into the 68-pin PC Card slot. See Microdrive and PC Card.

CompactFlash Module
CompactFlash modules are still used in digital SLR cameras with capacities up to 512GB. For form factor comparisons, see memory card.
References in periodicals archive ?
The speed and capacity of SanDisk Extreme Pro CompactFlash cards, as well as the ability to shoot and store 4K video directly to a CompactFlash card, are a major step forward for professional photographers and videographers, said Sam Nicholson, founder, Stargate Studios.
SanDisk Corporation (NASDAQ:SNDK), a provider of flash memory cards, has launched its new high-capacity CompactFlash card, the company announced yesterday.
The SanDisk Extreme Pro CompactFlash card raises the bar for professional-grade memory cards.
We combined the latest silicon with our patented IC Tower stacking technology and produced the highest density CompactFlash card available in the world," said Ken Roberts, director of product marketing at SimpleTech.
last week announced its 320MB Type II CompactFlash card, the highest capacity available in this form factor.
6-megapixel DC265 digital camera, a SanDisk-produced 64MB CompactFlash card carrying the Kodak Picture Card label, a comprehensive collection of interactive imaging software for both Macintosh and Windows platforms, a Kaidan custom panoramic tripod head and an interactive imaging software script.
Write Acceleration technology is enabled by firmware residing in both the camera and CompactFlash card.
Worldwide Computer Products News-18 April 2002-New Brain Boxes CompactFlash card has full support for Microsoft Windows CE '.
The CFast work group was formed in July 2007 to develop the CFast specification for a CompactFlash card with a SATA (Serial ATA) interface.
The CompactFlash Association (CFA) announces the formation of a working group to develop a specification for a CompactFlash card with a SATA (Serial ATA) interface.
The 512MB card launched in October 2001 and the Company's first 1GB CompactFlash card will ship November 2001.