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O
object
An entity, such as a
file, folder, shared folder, printer, or Active Directory object,
described by a distinct, named set of attributes. For example, the
attributes of a File object include its name, location, and size; the
attributes of an Active Directory User object might include the user's
first name, last name, and e-mail address.
For OLE and ActiveX, an
object can also be any piece of information that can be linked to, or
embedded into, another object.
offline
A state that marks a
component in a cluster as unavailable. A node in an offline state is
either inactive or not running. Resources and groups also have an offline
state.
OLE
A way to transfer and
share information between applications by pasting information created in
one application into a document created in another application, such as a
spreadsheet or word processing file.
on-disk
catalog
Information stored on a
local disk drive. The on-disk catalog contains a list of files and folders
that have been backed up in a backup set.
on-media
catalog
Information stored on
backup storage media. The on-media catalog contains a list of files and
folders that have been backed up in a backup set.
one-way
trust
A type of trust
relationship in which only one of the two domains trusts the other domain.
For example, domain A trusts domain B and domain B does not trust domain
A. All one-way trusts are nontransitive.
online
A state that marks a
component in a cluster as available. When a node is online, it is an
active member of the cluster and can own and run groups as well as honor
cluster database updates, contribute votes to the quorum algorithm, and
maintain heartbeats. Resources and groups also have an online
state.
Open Systems Interconnection (OSI)
reference model
A networking model
introduced by the International Organization for Standardization (ISO) to
promote multi-vendor interoperability. Open Systems Interconnection (OSI)
is a seven-layered conceptual model consisting of the application,
presentation, session, transport, network, data-link, and physical
layers.
OpenType
fonts
Outline fonts that are
rendered from line and curve commands, and can be scaled and rotated.
OpenType fonts are clear and readable in all sizes and on all output
devices supported by Windows. OpenType is an extension of TrueType font
technology.
operations
master
A domain controller that
has been assigned one or more special roles in an Active Directory domain.
The domain controllers
assigned these roles perform operations that are single-master (not
permitted to occur at different places on the network at the same time).
Examples of these operations include resource identifier allocation,
schema modification, PDC election, and certain infrastructure
changes.
The domain controller
that controls the particular operation owns the operations master role for
that operation. The ownership of these operations master roles can be
transferred to other domain controllers.
operator
In mathematics and in
programming and computer applications, a symbol or other character
indicating an operation that acts on one or more elements. You can use the
following four operators in standard calculations:
/ divide
* multiply
- subtract
+ add
For Indexing Service, a
word or character that specifies a relationship in a
query.
organizational
unit
An Active Directory
container object used within domains. An organizational unit is a logical
container into which users, groups, computers, and other organizational
units are placed. It can contain objects only from its parent domain. An
organizational unit is the smallest scope to which a Group Policy object
can be linked, or over which administrative authority can be
delegated.
orphan
A member of a mirrored
volume or a RAID-5 volume that has failed due to a severe cause, such as a
loss of power or a complete hard-disk head failure. When this happens, the
fault-tolerant driver determines that it can no longer use the orphaned
member and directs all new reads and writes to the remaining members of
the fault-tolerant volume.
orphan
file
A file that is stored
inside My Briefcase and not linked to any file outside My Briefcase. When
you update files, the orphan file is not synchronized with any other
file.
OS/2
A protected-mode, virtual
memory, multitasking operating system for personal computers based on the
Intel 80286, 80386, i486, and Pentium processors. OS/2 can run most
MS-DOS-based programs and can read all MS-DOS disks.
owner
In a Windows environment,
the person who controls how permissions are set on objects and can grant
permissions to others.
In the Macintosh
environment, an owner is the user responsible for setting permissions for
a folder on a server. A Macintosh user who creates a folder on the server
automatically becomes the owner of the folder, and can then transfer
ownership to someone else. Each Macintosh-accessible volume on the server
also has an owner.
owner
category
In the Macintosh
environment, the user category to which you assign permissions for the
owner of a folder or a Macintosh
volume.
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