dictionary of multimedia and internet applications: a guide for developers and users. francis botto

Print ISBN 0-471-98624-0 Online ISBN 0-470-84178-8

Z 1. A dimension of depth in a 3-D image or animation. (See 3-D.) 2. A measurement of impedance. Connected electronic devices typically have an input and output impedance. By matching these using the maximum power transfer theorem, an optimum electronic/electrical connection may be made. 3. The dimension (n) in which a processor exists in an MPP network configured as a cube or hypercube.

ZAP The process of eradicating data or applications from a system.

Zero beat A state where two frequencies are the same.

Ziff-Davis A large corporation engaged in the computer book and

magazine publishing sectors.

ZIF socket (Zero Insertion Force socket) A type of socket commonly found on motherboards that permits the safe and easy removal and replacement of processors. The socket is fitted with a lever which is used to lock the processor in place and to release it. ZIF sockets are also available for DIL (Dual In-Line) devices such as ROM (Read-Only Memory) chips.

ZIP 1. A file format from PKWare that is used for batch file compression. WinZip is an application that can be used to zip and unzip such compressed files. 2. A removable storage device manufactured by Iomega. Its removable disks store 100 Mbyte of data.

ZOG A hypertext system developed at Carnegie-Mellon University in the 1970s. Among other applications it was used for teleconferencing and CBT. It is best known for its role on the USS Carl Vinson, where it is used as a shipwide information and management system. Incorporating graphics, the Knowledge Management System (KMS) became the commercial face of ZOG.

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Zoom

Zoom A feature on many graphics and video editing programs that permits the user to enlarge a frame or image. All Windows applications feature such a control, which may typically be invoked from the View menu. The user may be presented with zoom-in values, such as 75%, 100%, 125% or 150%, or a value may be specified. Alternatively, scale ratios may be selected, such as 2:1, 3:1, 4:1 etc., which may be used to zoom in and out.

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