Glossary

IRQ: interrupt requestKB: kilobyteLCD: liquid crystal displayLED: light emitting diodeLSI: large scale integrationMB: megabyteOCR: optical character recognition (reader)PCB: printed circuit boardPCI: peripheral component interconnectRAM: random access memoryRGB: red, green, and blueROM: read only memoryRTC: real time clockSCSI: small computer system interfaceSIO: serial input/outputSXGA+: super extended graphics array plusTFT: thin-film transistorUART: universal asynchronous receiver/transmitterUSB: Universal Serial BusVESA: Video Electronic Standards AssociationVGA: video graphics arrayVRT: voltage reduction technologyWXGA+: wide extended graphics array plusWUXGA: wide ultra extended graphics arrayXGA: extended graphics array

A

adaptor: A device that provides an interface between two dissimilar electronic devices. For example, the AC Adaptor modifies the power from a wall outlet for use by the computer. This term also refers to the add-in circuit cards that control external devices, such as video monitors and magnetic tape devices.

allocate: To assign a space or function for a specific task.

alphanumeric: Keyboard characters including letters, numbers and other symbols, such as punctuation marks or mathematical symbols.

alternating current (AC): Electric current that reverses its direction of flow at regular intervals.

analog signal: A signal whose characteristics such as amplitude and frequency vary in proportion to (are an analog of) the value to be transmitted. Voice communications are analog signals.

Glossary-2

User’s Manual