CompactFlash (CF) is a type of storage device used in portable electronic devices. For storage, CompactFlash typically uses flash memory in a standard enclosure. CompactFlash cards are usually available in capacities from about 128 megabytes to about 64 gigabytes, with perhaps the most popular choices being between 256 MB and 2 GB (in Europe and North America). Lower capacity cards (below 128 megabytes) are becoming rare in stores because higher capacity cards are readily available at the same price. The largest CompactFlash Type II cards commonly available currently are the 16GB models from various manufacturers.