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Device 		Interface		Comments
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RFA (Resident	linear or paged		"roll your own" disk, typically has flash
Flash Array)	memory mapped		mapped into the CPU's address space and
					soldered on board
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DiskOnChip	memory mapped		http://www.m-sys.com
DIP		8/16-bit parallel	modular, requires only a chip select and
					standard memory read/write strobes
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ATA PC Card	memory or I/O		http://www.pc-card.com
		mapped ATA		removable, requires socket and PCMCIA or ATA controller
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Flash PC Card	memory mapped		http://www.pc-card.com
		8/16-bit parallel	removable, requires socket and PCMCIA controller
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CF (Compact	memory or		http://www.compactflash.org
Flash Socket)	I/O mapped ATA		removable, requires socket and PCMCIA or ATA controller
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IDE/SCSI				http://www.m-sys.com
1.3"		ATA			drop in replacement for standard hard disks
1.8"		ATA			requires IDE or SCSI controller and cables
2.5"		ATA/SCSI
3.5"		ATA/SCSI
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SmartMedia	8-bit mixed data	http://www.pc-card.com
SSFDC		and address,		http://www.ssfdc.or.jp
Socket		sequential access	removable, requires socket and controller or 
					special interface hardware
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SD		4-bit parallel,		http://www.sandisk.com
(Secure 	sequential		removable, requires socket and controller
Digital)	access			or special interface with hardware	
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Memory Stick	1-bit serial		http://www.sony.com
					removable, requires socket and controller 				
					or special interface with hardware
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