RF modulator: See radio-frequency modulator.

RGB color monitor: Stands for Red Green Blue. A type of color monitor that can do what is impossible on most types of color monitor—display text in color and in 80-column format.

Right Arrow: A key you can press (in most applications) to move the cursor one character to the right.

ROM: See read-only memory.

ROM disk: ROM chips on a memory expansion card that can contain application programs.

row: A way of designating the number of characters that fit on the computer's display.

run: What applications do when the computer is carrying out their instructions.

SAT: Stands for Scholastic Aptitude Test. Colleges use the results of the SAT to decide if a student is college material. There are computer applications that help you prepare for the SAT.

save: To store an application or data on a disk, as opposed to storing it temporarily in the memory of the computer.

scan: What the computer does when you first turn on the power switch. It starts looking (scanning the slots) for a disk drive controller card. It looks first at slot 7 (or the corresponding port); if it doesn't find a startup device there, it proceeds to the next-highest-numbered slot until it finds a startup device.

screen: The part of the monitor where information is displayed. Like a movie screen, it's the place where things are projected.

scroll: To move a document so you can see a different part of it.

scroll arrow: An arrow on either end of a scroll bar. Clicking the scroll arrow moves the document one line. Holding down the scroll arrow causes continuous scrolling.

scroll bar: A rectangular bar that may be along the right or bottom of a window. Clicking or dragging in the scroll bar causes the view of the document to change.

scroll box: The inverse box in a scroll bar. The position of the scroll box in the scroll bar indicates the position of what's in the window relative to the entire document.

search and replace: To look for a particular word or phrase throughout a document and exchange it for another word or phrase you specify.

sector: A part of a track. When disks are initialized for DOS 3.3, they are divided into tracks and sectors.

select: In mouse-based applications, to designate where the next action will take place. To select something, you click on it or drag across it.

Select button: A button on a printer that determines whether the printer should accept data from the computer or instructions from other buttons on the printer control panel (like the line feed button or form feed button).

serial device: A device that sends and receives data one bit at a time over a single wire. Compare parallel device.

serial interface: The condition of a computer and a peripheral device exchanging information one bit at a time along a single wire. Compare parallel interface.

serial port: One of two ports (printer and modem) on the back panel of the Apple IIGS designed for serial devices.

Glossary

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