Registry

A file or set of files in Microsoft Windows 95 and later versions that stores information about a computer's hardware and software configuration.

Register

Temporary memory storage areas located inside the CPU (central processing unit). Used to hold the intermediate results of calculations or other operations.

Real Mode

An MS-DOS mode in which a computer can perform only one operation at a time and an application expects full control of the system. Real mode operates within the MS-DOS 1-MB limitation.

RAM (Random Access Memory)

The main memory where a computer temporarily stores data.

RAID (Redundant Array of Independent Disks)

The combining of several drives using either hardware or software controls to make them seem to be one drive.