AMX Precis Installation & Operation Manual page 40

literal input or output
A physical input, output, or control that is connected to the system by a
cable, wire, or other means.
logical input
A logical set that consists entirely of literal inputs.
logical output
A logical set that consists entirely of literal outputs.
logical set
An ordered set of literals that are grouped together in order to be
considered a single entity and to be switched as a unit. The logical set
may consist of input, output, or control literals.
M
macro
A sequence of control and/or configuration commands stored by the
system, which can be invoked by the use of the Execute Macro
command. The command sequence may include timing between
commands.
P
preset
A snapshot of the characteristics (e.g., volume, configuration state) of an
arbitrary set of logical inputs or outputs. The states of these
characteristics can be recalled by the use of the preset command. Logical
inputs and outputs that are not included in the preset definition will not
change state. Presets are defined within the context of a virtual matrix.
V
virtual matrix (VM)
A collection of logical sets and their level definitions. Certain constraints
apply to the ways in which logical sets and/or their level definitions can
be combined to form virtual matrices. A virtual matrix allows multiple
enclosures to be treated as a single routing system. It also allows a single
enclosure to be treated as though it contained multiple independent
routing systems.
Precis Remote X/Y Control Panel 3