ROM

Read Only Memory. A portion of memory that can only be read and cannot be used for temporary storage. ROM retains its contents even when you turn off the power.

Roof directory

The top-level directory in MS-DOS, designated by a \ (backslash). All other directories are subdirectories of the root directory.

RS-232-C

A widely used, standard type of serial interface. You can connect up to two RS-232-C compatible devices to the built-in ports on your computer.

SCI files

System Configuration Information files. The file(s) created by the System Configuration program that contain all the information about the option cards you have installed and how all of your system resources are allocated. The most current SCI file is called SYSTEM.SCI.

SCSl adapter card

Small Computer System Interface adapter card. An input/output bus card that can be installed in one of your computer’s option slots to provide a standard interface between your computer and SCSI peripheral devices.

Sector

A contiguous section of a disk track that provides an address at which the computer can access data.

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