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A device that connects networks using different communications protocols.

Gateway GPRS Service Node (GGSN)
Node that relays IP packets to ISP, Operator WAP gateway or Company intranet. APN actually identifies one interface in one GGSN.

General Package Radio Service (GPRS)
GPRS is a standard for wireless communications which runs at speeds up to 150 kilobits per second. The current GSM (see GSM) systems only reach 9,6 kilobits. GPRS, which supports a wide range of bandwidths is an efficient use of limited bandwidth and is particularly suited for sending and receiving small bursts of data, such as e-mail and Web browsing, as well as large volumes of data.

The process of synchronizing one video signal with another. Because they are synchronized, the genlocked signal can be mixed with the original signal, allowing dissolves, wipes, and other transition effects.

A model for the surface of the earth based on gravitational factors. A geoid approximates a sea-level surface and is the reference for most land elevations and ocean depths that appear on maps and charts.

Geometric Dilution Of Precision (GDOP)
A numerical factor that specifies the portion of the error in a Global Positioning System (GPS) position, and time measurement that results from the geometry of the GPS satellites used to make the measurement.

Global Positioning System (GPS)
A space-based radio navigation system that consists of 24 satellites and ground support. This system provides a user with accurate information about vehicle position and velocity.

Global System for Mobile Communication (GSM)
Originally developed as a pan-European standard for digital mobile telephony in 1991. GSM today is one of the leading digital cellular systems available in more than 100 countries. GSM uses narrowband TDMA, which allows eight simultaneous calls on the same radio frequency. GSM reaches a speed of 9.600 BIT/s and can thus not be used for bandwidth applications.

global variable
A variable whose value can be accessed and modified by any statement in an application and not merely within a single routine in which it is defined.

The process of developing an application core whose feature and code designs do not make assumptions based on a single language or locale, and whose source code simplifies the creation of different language editions of an application.

globally unique identifier
A unique name assigned to a COM interface by the interface creator.

globally unique identifier (GUID)
A unique 128-bit value used to identify objects.

GPRS Tunneling Protocol (GTP)
The protocol used to tunnel IP packets from your location (SGSN) to GGSN.

A group of spoken words and phrases that can be recognized by the WCEfA speech system.

Graphics Device Interface (GDI)
The Windows CE subsystem responsible for displaying text and images on display devices and printers. The GDI processes graphical function calls from a Windows-based application. It then passes those calls to the appropriate device driver, which generates the output on the display hardware. By acting as a buffer between applications and output devices, the GDI presents a device-independent view of the world for the application while interacting in a device-dependent format with the device. Because of the smaller memory footprint of Windows CE-based devices, Windows CE supports only a subset of the standard Win32 GDI.

graphics editor
A resource editor that allows you to draw images, create toolbar bitmaps, and edit GIF and JPEG files.

Graphics Interchange Format (GIF)
GIF images are the most widely used graphic format on the web. GIF images display up to 256 colors.

graphics object
The pen, brush, bitmap, palette, region, font, and path associated with a device context. Windows CE does not support paths.

Graphics, Windowing, and Events Subsystem (GWES)
The Windows CE module that contains the graphics and windowing functionality needed to display text and images and to receive user input. It includes all the functionality needed to create and manage windows, controls, dialog boxes, and resources such as icons and menus. It also processes all user input. GWES includes the graphics device interface, which displays text and images on display devices and printers.

A sequence of shades ranging from black through white, used in computer graphics to add detail to images or to represent a color image on a monochrome output device. Like the number of colors in a color image, the number of shades of gray depends on the number of bits stored per pixel. Grays may be represented by actual gray shades, by halftone dots, or by dithering.

A subdivision of a beat. The number of grids per beat is part of the DirectMusic time signature.

gripper bar
A gripper bar is a tall, thin rectangle with a dark stripe running through it that appears on a rebar or a command band control. By touching and dragging a gripper bar with a stylus, a user can reposition a rebar or command bar. Gripper bars are especially useful for bringing off-screen rebar or command bar controls into view.

groove level
A value given to the music during style playback, determining which patterns can be selected at any given time. The author assigns a range of groove levels to each pattern.

group box
A rectangular area within a dialog box in which you can group together other controls that are semantically related. The controls are grouped by drawing a rectangular border around them. Any text associated with the group box is displayed in its upper-left corner.

group priority identifier
A mechanism that dictates which soft keys are assigned on-screen to the physical soft keys. The order in which the keys are assigned is determined by the order in which they appear in the collection or the MENUEX resource.

GSM 1800
Also known as DCS 1800 or PCN, GSM 1800 is a digital network working on a frequency of 1800 MHz. It is used in Europe, Asia-Pacific and Australia.

GSM 1900
Also known as PCS 1900, GSM 1900 is a digital network working on a frequency of 1900 MHz. It is used in the US and Canada and is scheduled for parts of Latin America and Africa.

GSM 900
GSM 900, or just GSM, is the world's most widely used digital network (see general explanation for GSM)

Graphical User Interface

A globally unique identifier.

A visual device that appears as a blue dotted line across a dialog box. Guides assist a user in aligning controls accurately within a dialog box.