|.TERM|V file
|.ACR|
	|.DEFIN|1|DFS: With disk caches, a file on the disk that, by
default, can hold up to 64 kilobytes of cached data. A maximum of
32,000 V files can be used for one disk cache.
		|.XREF|
		|.BOOK|introDCE
		|.TOPIC|
|.TERM|V.24
|.ACR|
	|.DEFIN|1|The 24th CCITT recommendation in the V series, listing the
definitions for interchange circuits between a DTE and a DCE.
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|V.35
|.ACR|
	|.DEFIN|1|The 35th CCITT recommendation in the V series, defining data
transmission at 48 kilobits per second using 60-180 kHz group band circuits.
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|valid
|.ACR|
	|.DEFIN|1|Allowed.
		|.XREF|
		|.BOOK|
		|.TOPIC|
	|.DEFIN|2|True, or conforming to an appropriate standard or authority.
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|value
|.ACR|
	|.DEFIN|1|XOM: An arbitrarily complex information item that can be
viewed as a characteristic or property of an object.
		|.XREF|attribute value
		|.BOOK|introDCE
		|.TOPIC|
	|.DEFIN|2|A set of characters or a quantity associated with a parameter or
name.
		|.XREF|
		|.BOOK|
		|.TOPIC|
	|.DEFIN|3|In programming, the contents of a variable or a storage location.
		|.XREF|
		|.BOOK|
		|.TOPIC|
	|.DEFIN|4|A specific occurrence of an attribute, such as blue for the
attribute color.
		|.XREF|
		|.BOOK|
		|.TOPIC|
	|.DEFIN|5|A quantity assigned to a constant, variable, parameter, or
symbol.
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|variable
|.ACR|
	|.DEFIN|1|A name used to represent a data item whose value can change
while the program is running. 
		|.XREF|
		|.BOOK|OSUsersGd
		|.TOPIC|
	|.DEFIN|2|In programming languages, a language object that can take
different values at different times.
		|.XREF|
		|.BOOK|OSUsersGd
		|.TOPIC|
	|.DEFIN|3|A quantity that can assume any of a given set of values.
		|.XREF|
		|.BOOK|OSUsersGd
		|.TOPIC|
|.TERM|variable substitution
|.ACR|
	|.DEFIN|1|The ability to change and display the values of variables in a
string, replacing a name of a variable with the value it represents. In
the\s12\f(HB sh \s12\fHshell command language, variable substitution is
denoted by a $ (dollar sign).
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|varying array
|.ACR|
	|.DEFIN|1|RPC: An array whose elements do not all need to be
transmitted during a remote procedure call.
		|.XREF|
		|.BOOK|introDCE
		|.TOPIC|
|.TERM|VC
|.ACR|
	|.DEFIN|1|*
		|.XREF|virtual circuit\(LI\s12\f(HB.
		|.BOOK|
		|.TOPIC|
|.TERM|vector
|.ACR|
	|.DEFIN|1|RPC: An array of other structures and the number
of array items.
		|.XREF|
		|.BOOK|introDCE
		|.TOPIC|
	|.DEFIN|2|An array of one dimension.
		|.XREF|
		|.BOOK|
		|.TOPIC|
	|.DEFIN|3|A quantity usually characterized by an ordered set of numbers.
		|.XREF|
		|.BOOK|
		|.TOPIC|
	|.DEFIN|4|In computer graphics, a directed line segment.
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|verify
|.ACR|
	|.DEFIN|1|To confirm the correctness.
		|.XREF|
		|.BOOK|
		|.TOPIC|
	|.DEFIN|2|To determine whether a transcription of data or other operation
has been accomplished accurately.
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|version
|.ACR|
	|.DEFIN|1|In addition to an object's name, information that identifies
different modification levels of the same logical object.
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|VFS
|.ACR|
	|.DEFIN|1|*
		|.XREF|Virtual File System
		|.BOOK|introDCE
		|.TOPIC|
|.TERM|VFS+
|.ACR|
	|.DEFIN|1|DFS: Extensions to the standard UNIX Virtual File
System (VFS).
		|.XREF|Virtual File System
		|.BOOK|introDCE
		|.TOPIC|
|.TERM|VGDA
|.ACR|
	|.DEFIN|1|Physical volume data area that contains essential
information for the initialization of the Logical Volume Manager.
		|.XREF|Logical Volume Manager
		|.XREF|physical volume
		|.XREF|volume group reserved area
		|.BOOK|DesignofOS
		|.TOPIC|
|.TERM|VGRA
|.ACR|
	|.DEFIN|1|Physical volume data area that contains information
that the Logical Volume Manager needs to know about the physical
volume (and the volume group to which the physical volume belongs).
		|.XREF|Logical Volume Manager
		|.XREF|physical volume
		|.XREF|physical volume reserved area
		|.BOOK|DesignofOS
		|.TOPIC|
|.TERM|VGSA
|.ACR|
	|.DEFIN|1|Physical volume data area used to track the validity and
availability of the physical volumes.
		|.XREF|Logical Volume Manager
		|.XREF|physical volume
		|.XREF|volume group reserved area
		|.BOOK|DesignofOS
		|.TOPIC|
|.TERM|virtual button
|.ACR|
     |.DEFIN|1|A model used by this style guide, which defines mouse
button bindings independent of the actual number of buttons on the mouse.
          |.XREF|
          |.BOOK|MotifStyleGd
          |.TOPIC|
|.TERM|virtual circuit
|.ACR|VC
	|.DEFIN|1|In X.25 communications, those facilities provided by a network
that give the appearance to the user of an actual connection. (TC97)
		|.XREF|switched virtual circuit
		|.XREF|permanent virtual circuit
		|.BOOK|
		|.TOPIC|
|.TERM|virtual device
|.ACR|
	|.DEFIN|1|A device that appears to the user as a separate entity, but is
actually a shared portion of a real device.
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|virtual device driver
|.ACR|VDD
	|.DEFIN|1|*
		|.XREF|device handler
		|.BOOK|
		|.TOPIC|
|.TERM|Virtual File System
|.ACR|VFS
	|.DEFIN|1|DFS: A level of abstraction above the specific interfaces
to various types of file systems. It is used to avoid having to change
kernel code to handle low-level, system-specific differences.
		|.XREF|
		|.BOOK|introDCE
		|.TOPIC|
|.TERM|virtual interrupt handler
|.ACR|
	|.DEFIN|1|The second-level interrupt handler of a device head.
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|virtual machine
|.ACR|VM
	|.DEFIN|1|A functional simulation of a computer and its related devices. A
virtual machine usually includes an operating system and one or more virtual
devices.
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|virtual memory
|.ACR|
	|.DEFIN|1|Addressable space that appears to be real memory. From virtual
memory, virtual addresses are mapped into real memory locations. The size of
virtual memory is limited by the addressing scheme of the computer system and
by the amount of auxiliary storage available, not by the actual number of
main storage locations. Contrast with \fBreal memory\fP.
		|.XREF|
		|.BOOK|OSPortGd
		|.BOOK|OSAdminGd
		|.TOPIC|
|.TERM|virtual storage
|.ACR|
	|.DEFIN|1|See Virtual Memory.
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|visible
|.ACR|
	|.DEFIN|1|A region of a window that is viewable and not occluded on the
screen by the user.
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|VM
|.ACR|
	|.DEFIN|1|*
		|.XREF|virtual memory
		|.BOOK|
		|.TOPIC|
|.TERM|vnode
|.ACR|
	|.DEFIN|1|DFS: The structure used to access the inode or anode
structure associated with a specific file through a virtual file system
interface. The term vnode stands for virtual node.
		|.XREF|anode
		|.BOOK|introDCE
		|.TOPIC|
|.TERM|voice-grade telephone line
|.ACR|
	|.DEFIN|1|A telephone line normally used for transmission of voice
communications. The line requires a modem for data communications.
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|volatile attribute
|.ACR|
	|.DEFIN|1|The keyword \s12\f(HBvolatile\s12\fH located in a definition,
declaration, or cast. It causes the C language compiler to place the value of
the data object in storage and to reload this value at each reference to the
data object.
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|volatile register
|.ACR|
	|.DEFIN|1|In a C language program, a register whose value on entry need
not be preserved when the called routine returns.
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|volgrp
|.ACR|
	|.DEFIN|1|Structure which is allocated when the volume group< is
activated.  This structure contains general information about a volume
group.
		|.XREF|Logical Volume Manager
		|.XREF|physical volum
		|.XREF|logical volume
		|.BOOK|DesignofOS
		|.TOPIC|
|.TERM|volume
|.ACR|
	|.DEFIN|1|A certain portion of data, together with its data carrier, that
can be handled conveniently as a unit.
		|.XREF|
		|.BOOK|
		|.TOPIC|
	|.DEFIN|2|The level of sound of the system.
		|.XREF|
		|.BOOK|
		|.TOPIC|
	|.DEFIN|3|The physical storage location of a file system.
		|.XREF|
		|.BOOK|
		|.TOPIC|
	|.DEFIN|1|Corresponds to a disk driver, or a disk partition in a
traditional UNIX system.
		|.XREF|Logical Volume Manager
		|.BOOK|DesignofOS
		|.TOPIC|
|.TERM|Volume Group
|.ACR|
	|.DEFIN|1|A collection of physical volumes (read-write hard drives) of
varying size and type.
		|.XREF|
		|.BOOK|
		|.TOPIC|
	|.DEFIN|1|Set of physical and logical volumes, and the mappings
between them.  Logical volumes can only map physical volumes that are
in the same volume group.
		|.XREF|Physical Volume
		|.XREF|Logical Volume Manager
		|.BOOK|DesignofOS
		|.BOOK|OSAdminGd
		|.TOPIC|
|.TERM|volume group
|.ACR|
	|.DEFIN|1|A collection of physical volumes (read-write hard drives) of
varying size and type.
		|.XREF|
		|.BOOK|
		|.TOPIC|
	|.DEFIN|1|Set of physical and logical volumes, and the mappings
between them.  Logical volumes can only map physical volumes that are
in the same volume group.
		|.XREF|Physical Volume
		|.XREF|Logical Volume Manager
		|.BOOK|DesignofOS
		|.BOOK|OSAdminGd
		|.TOPIC|
|.TERM|volume group descriptor area
|.ACR|VGDA
	|.DEFIN|1|Physical volume data area that contains essential
information for the initialization of the Logical Volume Manager.
		|.XREF|Logical Volume Manager
		|.XREF|physical volume
		|.XREF|volume group reserved area
		|.BOOK|DesignofOS
		|.TOPIC|
|.TERM|volume group header
|.ACR|
	|.DEFIN|1|Volume group descriptor area field that contains global
information about the volume group.
		|.XREF|Logical Volume Manager
		|.XREF|physical volume
		|.XREF|volume group descriptor area
		|.BOOK|DesignofOS
		|.TOPIC|
|.TERM|volume group reserved area
|.ACR|VGRA
	|.DEFIN|1|Physical volume data area that contains information
that the Logical Volume Manager needs to know about the physical
volume (and the volume group to which the physical volume belongs).
		|.XREF|Logical Volume Manager
		|.XREF|physical volume
		|.XREF|physical volume reserved area
		|.BOOK|DesignofOS
		|.TOPIC|
|.TERM|volume group status area
|.ACR|VGSA
	|.DEFIN|1|Physical volume data area used to track the validity and
availability of the physical volumes.
		|.XREF|Logical Volume Manager
		|.XREF|physical volume
		|.XREF|volume group reserved area
		|.BOOK|DesignofOS
		|.TOPIC|
|.TERM|volume group trailer
|.ACR|
	|.DEFIN|1|Volume group descriptor area field that contains a
timestamp value describing when the volume group descriptor was last updated.
		|.XREF|Logical Volume Manager
		|.XREF|physical volume
		|.XREF|volume group descriptor area
		|.BOOK|DesignofOS
		|.TOPIC|
|.TERM|Volume ID
|.ACR|Vol ID
	|.DEFIN|1|A series of characters, recorded on the disk, used to identify
the disk to the user and to the system.
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|volume label
|.ACR|
	|.DEFIN|1|An area on tape or disk that is used to identify the tape volume
and its owner.
		|.XREF|
		|.BOOK|
		|.TOPIC|
|.TERM|VRC
|.ACR|
	|.DEFIN|1|Vertical redundancy check.
		|.XREF|
		|.BOOK|
		|.TOPIC|
