perform certain functions.

G

GND: Ground. An RS-232-C signal used in the exchange of data between a computer and serial device.

graphics: The use of drawings, pictures, or other images, such as charts or graphs, to present information.

H

half duplex: See duplex.

handshake: The series of signals between a computer and another peripheral device (for example, a modem and a computer) that sets the parameters required for exchanging data.

hard disk: A non-removable disk usually referred to as drive C. The factory installs this disk and only a trained engineer can remove it for servicing. Also called fixed disk.

hard disk drive (HDD): An electro-mechanical device that reads and writes a hard disk. See also hard disk.

hardware: The physical electronic and mechanical components of a computer

system: typically, the computer itself, external disk drives, etc. See also software and firmware.

hexadecimal: The base 16 numbering system composed of the digits 0 through 9 and the letters A, B, C, D, E, and F.

high memory area (HMA): The first 64KB of extended memory.

host computer: The computer that controls, regulates, and transmits information to a device or another computer.

hot key: The T2400 Series feature in which certain keys in combination with the extended function key, Fn, can be used to set system parameters, such as speaker volume.

I

icon: A small graphic image displayed on the screen or in the indicator panel. In Windows, an icon represents an object that the user can manipulate.

input: The data or instructions you provide to a computer, communication device or other peripheral device from the keyboard or external or internal storage devices. The data sent (or output) by the sending computer is input for the receiving computer.

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Toshiba T2150CD user manual Half duplex See duplex