NonStop S-Series Hardware Installation and FastPath Guide (G06.25+)

Glossary
HP NonStop S-Series Hardware Installation and FastPath Guide—529443-001
Glossary-122
upward compatibility
upward compatibility. The ability of a requester to operate with a server of a later revision
level. In this case, the requester is upward-compatible with the server, and the server is
downward-compatible with the requester. Contrast with downward compatibility.
User Code (UC). See TNS code space.
user code. A logically distinct part of the HP NonStop™ operating system that consists of
the code for user processes.
user database. A database within an HP NonStop™ node that contains the user name,
user ID, group ID, initial working directory, and initial user program for each user of the
node.
user ID. The unique identification of a user within a node.
In the Guardian environment, the term user ID usually means the structured view of the
HP NonStop™ operating system user ID. In the Open System Services (OSS)
environment, the term user ID usually means the scalar view of the HP NonStop™
operating system user ID—a number called the UID.
User Library (UL). See TNS code space.
user library. (1) An object code file that the operating system links to a program file at run
time. A program can have only one user library. See also TNS user library and TNS/R
native user library. (2) A library loadfile associated with a program so that it emulates
the user library feature of the operating system on TNS systems. For position-
independent code programs on TNS/R systems, the user library is a dynamic-link
library. It is treated as if it were the first library in the program's libList; thus it is
searched first for symbols required by the program. However, a user library does not
appear in the program's libList; instead, its name is recorded internally in the program's
loadfile. A program can be associated with at most one user library; the association
can be specified using the linker at link time or in a later change command, or at run
time using the process creation interfaces. (The /LIB …/ option to the RUN command
in TACL uses these interfaces.)
user name. A string that uniquely identifies a user within the user database for a node.
UTC. See Coordinated Universal Time (UTC).
UTP. See unshielded twisted pair (UTP).
V. See volt (V).
V.35. The International Telecommunications Union, Telecommunication Standardization
Sector (ITU-T) standard for data transmission at 48 kilobits/second over 60 - 108
kilohertz group band circuits. It contains the 34-pin V.34 connector specifications
normally implemented on a modular RJ-45 connector. V.35 is the equivalent of
Electronics Industry Association (EIA) RS-422/RS-449.