CompactFlash

CompactFlash is a removable flash-memory card format introduced by SanDisk in 1994. Its cards use a parallel interface and have been used in cameras, computers, and other electronic devices.

NAND flash memory: A nonvolatile memory technology that stores data in arrays of electrically programmable cells. CompactFlash cards use flash memory to retain data without power.
SanDisk: An American data-storage company founded in 1988 and later acquired by Western Digital. SanDisk introduced CompactFlash in 1994.
Digital camera: A camera that records images as digital data using an electronic image sensor. Many digital cameras used CompactFlash for removable image storage.
Secure Digital: A removable flash-memory card format used in cameras, phones, and other electronic devices. SD cards became a smaller, widespread alternative to CompactFlash in consumer cameras.
ATA: A storage-device interface standard used to connect drives and host computers. CompactFlash borrowed ATA commands and signaling, enabling many cards to appear as miniature hard drives.
Digital photography: The capture and storage of images using electronic sensors and digital data. CompactFlash became a removable storage option as digital cameras spread.
Digital single-lens reflex camera: A digital camera that uses a mirror and optical viewfinder to frame images through its taking lens. Professional and enthusiast DSLR models commonly offered CompactFlash slots.
XQD card: A high-speed removable memory-card format developed for professional imaging equipment. XQD succeeded CompactFlash in some high-end cameras with a smaller, faster design.
CompactFlash Type I: The thinner of the two CompactFlash card form factors, measuring 3.3 millimeters thick. Its dimensions define the thinner slot used by many cameras and card readers.
PC Card: A family of expansion cards for portable computers, standardized by the PCMCIA. CompactFlash adapted a related interface into a smaller card format.

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