TYAN S5560, Manual

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USB (Universal Serial Bus): a versatile port. This one port type can function as a
serial, parallel, mouse, keyboard or joystick port. It is fast enough to support video
transfer, and is capable of supporting up to 127 daisy-chained peripheral devices.
VGA (Video Graphics Array): the PC video display standard
V-SYNC: controls the vertical scanning properties of the monitor.
ZCR (Zero Channel RAID): PCI card that allows a RAID card to use the onboard
SCSI chip, thus lowering cost of RAID solution
ZIF Socket (Zero Insertion Force socket): these sockets make it possible to insert
CPUs without damaging the sensitive CPU pins. The CPU is lightly placed in an open
ZIF socket, and a lever is pulled down. This shifts the processor over and down,
guiding it into the board and locking it into place.