title bar: The horizontal bar at the top of a window that shows the name of the window's contents and lets you move the window.

track: One of numerous concentric bands into which a formatted disk is divided. Compare sector.

transmitting device: The computer that is sending information.

troubleshooting: Diagnosing a problem—and (hopefully) solving it. It's best to get peripheral devices that work automatically with the Apple IIGS so you won't have personal experience with this activity.

turtle: A cursor shaped like a triangle. Using Logo programming commands like FORWARD, BACK, LEFT, RIGHT, you can move the turtle around the screen and create graphics.

Up Arrow: A key you can press (in some applications) to make the cursor move up one line.

user group: A computer club whose members share programs they've written and information they've learned.

user ID: A number that identifies you as a subscriber to an information service.

user Interface: The way a computer application communicates with you.

utilities or utility programs: A set of applications that controls and manipulates the information on disks.

vertical-market software: See special-interest application.

video monitor: See monitor.

voice input device: A device that translates the spoken word into a form that some software can process.

volume name: The name of he disk or its main directory. Compare pathname.

window: With mouse-based applications,one or more areas on the screen showing one or more documents at a time.

word processing application: a type of application designed to make writing and editing easier and faster.

word wraparound: In some word processing applications, the automatic jump to the start of the next line (bringing the word you're typing with it) when the cursor reaches the right margin, without you pressing Return.

write: To record information on a disk.

write-enable notch: A small, square cutout in the upper-right corner of a 5.25-inch disk or the small, square hole in the upper-right corner of a 3.5-inch disk that indicates whether or not information can be recorded on the disk.

write-protect: To prevent changes to the contents of a disk by coveting the write enable notch on a 5.25-inch disk or by sliding the small, plastic tab to uncover the square hole on a 3.5- inch disk. Compare copy-protect.

write-protect tab: A piece of tape that you can use to cover the write-enable notch on a 5.25-inch disk so information can't be recorded on it. The write-protect tab on a 3.5-inch disk is a small piece of plastic that slides to cover or uncover a square hole in the upper-right side of the disk.

XOFF: An ASCII character that tells the transmitting device to halt transmission.

XON: An ASCII character that tells the transmitting device to resume transmission.

Z80 card: A circuit board containing a Z80 microprocessor. An Apple IIGS equipped with a Z80 card can run programs based on the popular CP/M operating system.

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Glossary