NonStop System Glossary

access control list
A structure attached to a software object that defines access permissions for multiple users and
groups. It extends the permissions defined by the file system permission bits by allowing you to
specify the access rights of many individuals and groups instead of just one of each.
access mode
The form of file access permitted for a user or process.
ACH
See “Advanced Cluster Hub (ACH)” (page 45).
ACL
See automatic cartridge loader (ACL) or access control list.
ACS
See automated cartridge subsystem (ACS).
action
An operation that can be performed on a selected resource.
activation
The operator action of putting software into use after the software has been applied from the
activation package to the target system.
activation package
A set of files containing product files, operator instructions, and instructions for applying the software
on the target system. It consists of a header file containing the activation instructions and file
attributes, multiple data files, Distributed Systems Management/Software Configuration Manager
(DSM/SCM) control information, and Event Management Service (EMS) events.
adapter
See ServerNet adapter.
adapter cable
1. A cable that connects components that have incompatible electrical interfaces.
2. For the ServerNet wide area network (SWAN) concentrator, one of four types of cable that
can connect any of the six 50-pin WAN ports to one of the supported electrical interfaces (RS-232,
RS-449, X.21, or V.35).
ADAPTER object type
The Subsystem Control Facility (SCF) object type for all adapters attached to your system.
address space
The memory locations to which a process has access.
ADE
See application development environment (ADE).
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