Stands for Small Computer Systems Interface. A standard high-speed parallel interface used to connect PCs to peripheral devices such as disk drives and scanners. Fast-SCSI allows data to be transferred at a higher rate. SCSI-2 is a newer standard that provides a wider data bus and transfers data faster still. Wide-SCSI is a development that provides a wider data bus than the original SCSI, so can transfer more data. SCSI is the current standard used to connect high-capacity, high-performance disk drives to PCs. Smaller disk drives are connected with an IDE interface, which is slower, but cheaper. SCSI replaced the older ESDI interface and allows several peripherals to be connected, in a daisychain, to one controller. (See also IDE, ESDI, Daisychain.)
