R

race condition

A condition in which a feedback circuit interacts with the internal circuit processes in a way that produces chaotic output behavior.

remote LU

In an APPC or CPI-C conversation, the LU on the remote end. Contrast with local LU. See also remote TP.

remote TP

In an APPC or CPI-C conversation, the TP on the remote end. Contrast with local TP. See also remote LU.

Request Unit Interface (RUI)

A basic interface that allows programs to acquire and release control of conventional LUs. The RUI also reads and writes request/response headers (RHs), transmission headers (THs), and request unit (RU) data. Contrast with Session Level Interface.

root

The topmost node in a directory structure.

root directory

The first directory on a drive in which all other files and subdirectories exist.