User`s guide

Glossary
Agilent VISA User’s Guide 137
logical unit
A number associated with an interface. A logical unit, in SICL and
Agilent VEE, uniquely identifies an interface. Each interface on the
controller must have a unique logical unit.
mapping
An operation that returns a reference to a specified section of an
address space and makes the specified range of addresses accessible
to the requester. This function is independent of memory allocation.
non-Controller role
A computer is in a non-Controller role when it acts as a device
communicating with a computer that is in a Controller role.
notification area
The area on the Windows taskbar where notifications are posted,
typically in the lower right corner of the screen. Also called taskbar
notification area or Windows notification area.
operation
A defined action that can be performed on a resource.
primary VISA
The VISA installation that controls the visa32.dll file. The primary
VISA will be used by default in VISA applications. See also
secondary VISA.
process
An operating system component that shares a system's resources. A
single-process computer system allows only a single program to
execute at any given time. A multi-process computer system allows
multiple programs to execute simultaneously, each in a separate
process environment.