Gateway:-

 A shared connection between a local -area network (LAN) and a larger system, such as a mainframe computer or a large packet-switching network, whose communications protocols are different. Usually slower than a bridge or router, a-gateway is a combination of hardware and software with its own processor and memory used to perform protocol conversions.

Gender Changer:-

A special intermediary connector for use with two cables that both have only male connectors or only female connectors.

Gigabyte:-

Abbreviated GB. Strictly speaking, one billion bytes; however, in computing, in which bytes are most often counted in powers of 2, a gigabyte becomes 230, or 1,073,741,824 bytes.

Global Login:-

A mechanism that lets users log in to the network, rather than repeatedly logging in to individual servers.

Global Network:-

An international network that spans all departments, offices, and subsidiaries of the corporation. Global networks bring their own set of problems, including those of different time zones, languages, established standards, and PTT (Postal Telephone and Telegraph) companies.

Gopher:-

A popular client/server application that presents Internet resources as a series of menus, shielding the user from the underlying mechanical details of IP addresses and different access methods. Gopher menus may contain documents you can view or download, searches you can perform, or additional menu selections. When you choose one of these items, Gopher does whatever is necessary to obtain the resource you requested, either by downloading a document or by jumping to the selected Gopher server and presenting its top-level menu.

Gopher clients are available for most popular operating systems, including the Macintosh, DOS, Windows and UNIX.

Graphical User Interface:-

Abbreviated GUI, pronounced "gooey." A graphics-based user interface that allows users to select files, programs, or commands by pointing to pictorial representations on the screen rather than by typing long, complex commands from a command prompt.

Applications execute in windows, using a consistent set of pull-down menus, dialog boxes, and other graphical elements, such as scroll bars and icons. This consistency among interface elements is a major benefit for the user, because as soon as you learn how to use the interface in one program, you can use it in all other programs running in the same environment. The use of graphical elements in a user interface was pioneered at Xerox Corporation's Palo Alto Research Center (PARC) in the early 1970s.

Unfortunately, at that time the hardware needed to support such a user interface was well beyond the reach of most users. In 1979, Steve Jobs of Apple computer visited PARC and recognized the importance of the user-interface work being done; this visit led to the development of the interface for the ill-fated Apple Lisa computer, and eventually to the Apple Macintosh series of computers. Since then, GUIs have emerged for most computing environments, including the Macintosh System 7, Microsoft Windows and Windows NT, UNIX, and the OS/ 2 Desktop.