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62 Appendix A: Hardware glossary
• RAM.
Random access memory. RAM is memory in which the operating system,
application programs, and data in current use are stored so that they can be
accessed by the processor. Information stored in RAM is lost when power is cut
off. RAM chips can be typically installed on a memory module (such as a
SO-DIMM memory module) that is plugged into the motherboard.
See also SO-DIMM.
• SSD
Solid state drive. A data storage device that has no moving (mechanical)
components. They are typically more resistant to physical shock, run silently, have
lower access time, and less latency than traditional hard disk drives (DDs).
• SO-DIMM.
Small outline dual in-line memory module. A SO-DIMM is a memory module with
integrated circuitry.
See also RAM.
• Transistor-transistor logic (TTL) devices.
TTL devices use a logic signal between 0 and +5 V, compatible with TTL standard.
A Matrox 4Sight GPm TTL-compatible output relies on the connected TTL
input device to provide the necessary voltage.
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