The computer operating system for IBM's zSeries 900 (z900) line of large (mainframe) servers. z/OS is a renamed and upgraded version of OS/390, which in turn evolved from the MVS operating system.

A standard communications protocol for the search and retrieval of bibliographic data in online databases. Z39.50 is used on the Internet to search the Online Public Access Catalogues (OPAC) of library holdings.

A 64-bit mainframe computer from IBM that contains up to 32 processors, together capable of executing approximately 9,000 million instructions per second (MIPS), nearly three times the processing power of IBM's z900. 

A logical structure intended to provide a comprehensive representation of an information technology enterprise. It allows for multiple perspectives and categorization of business artifacts. 

ZBrush is a digital sculpting tool that combines 3D/2.5D modeling, texturing and painting. It uses a proprietary "pixol" technology (see below) which stores lighting, color, material, and depth information for all objects on the screen. The main difference between ZBrush and more traditional modeling packages is that it is more akin to sculpting.

Zend Framework (ZF) is an open source, object-oriented web application framework implemented in PHP 5 and licensed under the New BSD License

Microsoft's initiative to help make its operating system easier to install and manage. The goal is to reduce the ownership costs of PCs, particularly in large corporations with many thousands of desktop computers to support.

A server-based computing model in which the end user's computing device has no local storage. A zero client can be contrasted with a thin client, which retains the operating system and each device's specific configuration settings in flash memory. 

Zettair is a compact text search engine for indexing and search of HTML (or TREC) collections. It is an open source software developed by a group of researchers at RMIT University. Its primary feature is the ability to handle large document collections (100 GB and more). It has a single executable, which performs both on-the-fly indexing and searching, with a command-line interface.

A malware toolkit that allows a cybercriminal to build his own Trojan Horse. Once a Zeus Trojan infects a machine, it remains dormant until the end user visits a Web page with a form to fill out. 

An open source email and collaboration platform that includes email, contacts, calendar, documents and more. It is a Web-based application suite that can be deployed as an on-premise private cloud or outsourced public cloud service.

A voice over IP (VoIP) encryption extension for the Real-Time Transport Protocol (RTP). ZRTP is a part of a software developer's kit (SDK) for an encryption program Zimmerman created called Zfone. 

A small, portable disk drive used primarily for backing up and archiving personal computer files.

ZIP is an archive file format that supports lossless data compression. A .ZIP file may contain one or more files or folders that may have been compressed. The .ZIP file format permits a number of compression algorithms.

Zip file recovery is basically restoring the data from a corrupted archive file (.zip format)

Zoho Support, an on-demand, web-based, help desk software allows your agents to access data from any location and provides the latest information to support your customers.