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Serial port: called as such because it transmits the eight bits of a byte of data along one wire, and
receives data on another single wire (that is, the data is transmitted in serial form, one bit after
another).
SCSI Interrupt Steering Logic (SISL): Architecture that allows a RAID controller, such as
AcceleRAID 150, 200 or 250, to implement RAID on a system board-embedded SCSI bus or a set
of SCSI busses.
SIMM (Single In-line Memory Module): formally the most common form of RAM for
motherboards. They must be installed in pairs, and do not have the carrying capacity or the speed
of DIMM modules.
Sleep/Suspend mode: in this mode, all devices except the CPU shut down.
SDRAM (Static RAM): unlike DRAM, this type of RAM does not need to be refreshed in order to
prevent data loss. Thus, it is faster and more expensive.
Standby mode: in this mode, the video and hard drives shut down; all other devices continue to
operate normally.
Striping: see RAID
UltraDMA-33/66/100: a fast version of the old DMA channel. UltraDMA is also called UltraATA.
Without proper UltraDMA controller, your system cannot take advantage of higher data transfer
rates of the new UltraDMA/UltraATA hard drives.
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.
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 shift the processor over and down, guiding into the board and locking it into
place.
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