Greenwich Civil Time (GCT)Synonym Greenwich Mean Time (GMT). Obsolete term. See Coordinated Universal Time.
Greenwich Mean Time (GMT)(GMT)Same as Coordinated Universal Time (UTC); the international time standard kept at Greenwich, England.
grepOriginally from the old Unix editor command for "Globally search for a Regular Expression and Print it", now used in the general sense of any kind of…
Grey Hat SEOSEO using both Black Hat and White Hat techniques.
GridA common term referring to an electricity transmission and distribution system.
grid cellA discretely uniform unit that represents a portion of the Earth, such as a square meter or square mile.
Grid ComponentThe grid component is a super class of object that represents every managed entity, whether physical or logical, within an enterprise grid.
Grid ComputingThe use of pools of resources onto which applications or services may be dynamically provisioned and re-provisioned to meet the goals of one or more…
grid map fileA file containing entries mapping certificate subjects to local user names. This file can also serve as a access control list for GSI enabled services and…
grid security directoryThe directory containing GSI configuration files such as the GSI authorization callout configuration and GAA configuration files.
Grid Security Infrastructure (GSI)GSI stands for Grid Security Infrastructure and is used to describe the original infrastructure of GT security, which is comprised of SSL, PKI and proxy…
GridFTPThe Grid File Transfer Program provides high-performance and reliant data transfer.
GRIS (Grid Resource Information Service)The Grid Resource Information Service is the repository of local resource information derived from information providers.
GroundA device used to protect the user of any electrical system or appliance from shock.
ground constantsThe electrical parameters of earth, such as conductivity, permittivity, and magnetic permeability.
ground controlPhysical points on the ground whose positions are known with respect to some horizontal coordinate system and/or vertical datum.
ground currentIn the presence of an electrical fault, the current that flows in the protective ground wire of a power distribution system.
Ground Entry Point (GEP)OBSOLETE. GEPs provide the communications interfaces between the SDS space orbital/sub-orbital elements and the C 2 E. See IFICS.
Ground LoopIn geothermal heat pump systems, a series of fluid-filled plastic pipes buried in the shallow ground, or placed in a body of water, near a building.
ground planeAn electrically conductive surface that serves as the near-field reflection point for an antenna. Note: A ground plane may consist of a natural (e.g.
ground potentialThe zero reference level used to apply and measure voltages in a system. Note: A potential difference may exist between this reference level and the…
Ground-Based Interceptor (GBI)A kinetic energy exoatmospheric interceptor with long flyout range to provide, where possible, a multiple engagement capability for defense of the U.S.
Ground-Based Radar (GBR)A task-able, modular, multi-function, phased-array radar that provides surveillance, tracking and engagement planning data in post-boost, midcourse, and…
Ground-Based Radar Terminal (GBRT)The sensor for the NMD system. An X-band, ground-based, phased array radar capable of detecting, tracking, and providing discrimination information to a…
ground-return circuitA circuit using a common return path that is at ground potential. Note: Earth may serve as a portion of the ground-return circuit. 2.
ground-start signalingA type of analog voicegrade access line signaling that requires the customer interface (CI) to provide a ground on the ring conductor at the network…
group(also referred to as a Technology Center or TC) - a unit of several Group Art Units in the mechanical, electrical, chemical or design area, managed by one…
group addressIn a communications network, a predefined address used to address only a specified set of users. Synonym collective address.
group alerting and dispatching systemA service feature that (a) enables a controlling telephone to place a call to a specified number of telephones simultaneously, (b) enables the call to be…
group delayThe rate of change of the total phase shift with respect to angular frequency, dθ/d, through a device or transmission medium, where θ is the total phase…
group delay timeIn a group of waves that have slightly different individual frequencies, the time required for any defined point on the envelope (i.e.
group distribution frame (GDF)In frequency-division multiplexing, a distribution frame that provides terminating and interconnecting facilities at the group level, i.e.
group ID (GID)The number used by UNIX systems to identify groups.
group index (N)In fiber optics, for a given mode propagating in a medium of refractive index η, the velocity of light in vacuum, c, divided by the group velocity of the…
Group membershipsThe groups to which a user account belongs. Permissions and rights granted to a group are also provided to its members.
Group Policy containerAn object that is stored in Active Directory Domain Services and that is associated with a given Group Policy object.
Group Policy Management EditorThe name of the window for the editor snap-in that accompanies the Group Policy Management Console.
Group Policy ObjectA collection of Group Policy settings, stored at the domain level as a virtual object that consists of a Group Policy container and a Group Policy…
Group Policy object (GPO)A logical concept that is used to represent a single collective set of computer and/or user policies.
Group Policy Object EditorThe Microsoft Management Console (MMC) snap-in that is used to edit Local Group Policy settings.
groupwareSoftware designed to operate on a network and allow several people to work together on the same documents and files.
Growable DiskA type of virtual disk in which only as much host disk space as is needed is initially set aside, and the disk grows as the virtual machine uses the space.
GSEAbbreviation for government sponsored enterprisesa collection of financial services corporations formed by the United States Congress to reduce interest…
GSM (Global system for mobile communication)one of the leading digital cellular systems. GSM uses narrowband TDMA , which allows eight simultaneous calls on the same radio frequency.
GSSPGenerally-accepted Systems Security Principles.
GSTSOBSOLETE. A fast-response, rocket-launched, Long Wavelength Infrared (LWIR) and visible waveband sensor, which would have enhanced the information…
guardIn computer security, a functional unit that provides a security filter between two data processing systems operating at different security levels or…
Guard (System)A mechanism limiting the exchange of information between information systems or subsystems.
guard bandSee frequency guard band, time guard band.
guarded frequencyA transmission frequency that is not to be jammed or interfered with because of the value of the information being derived from it.
Guessing EntropyA measure of the difficulty that an attacker has to guess the average password used in a system. In this document, entropy is stated in bits.
GuestA virtual machine running within VMware Workstation. See also Virtual Machine.
Guest OS (Operating System)in a hosted environment, the operating system running in a virtual machine created on top of the host operating system and supported by the virtualization…
guest systemAlso known as guests, virtual machines or domU.
Guestbook SpamA type of low quality automated link which search engines do not want to place much trust on.