A host program that allows a single computer to support multiple, identical execution environments. All the users see their systems as self-contained computers isolated from other users, even though every user is served by the same machine.

An operating system from the Digital Equipment Corporation (DEC) that runs in its older mid-range computers. 

A program that allows a computer to connect to a network. It can also be used to connect all the computers on a local area network (LAN) to a larger network such as the Internet or a collection of LANs.

A type of remote-control software that makes it possible to control another computer over a network connection. Keystrokes and mouse clicks are transmitted from one computer to another. 

A technology that facilitates the control of remotely located computer(s) or server(s) over the Internet. Data can be stored/retrieved, software can be run and peripherals can be operated through a Web browser as if the distant hardware were onsite.

A virtual office provides communication and address services that allow users to reduce traditional office costs while maintaining business professionalism.

A dynamically configurable pool of public cloud computing resources that requires the use of encryption protocols, tunneling protocols and other security procedures to transfer data between a private enterprise and a cloud service provider. 

A database security feature that is built into an Oracle database server, as opposed to being part of an application that is accessing the data. The user is only allowed to see the data they have been given permission to see.

A technology that makes it possible to connect local area networks (LANs) over the Internet, so that they appear to subscribers like a single Ethernet LAN. 

A network that uses a public telecommunication infrastructure, such as the Internet, to provide remote offices or individual users with secure access to their organization's network.

A.k.a an SSL (Secure Sockets Layer) VPN appliance, is a network device equipped with enhanced security features. It is in effect a router that provides firewall protection, load balancing, authorization, authentication and encryption for VPNs.

A.k.a Virtual Dedicated Server (VDS), is a virtual server that appears to the user as a dedicated server but is actually installed on a computer serving multiple Web sites. 

A strategy for efficiently managing space in a Storage Area Network (SAN) by allocating physical storage on an "as needed" basis. This strategy is also called thin provisioning.

An artificial environment created with computer hardware and software and presented to the user in such a way that it appears and feels like a real environment. The computer-generated simulated environment can be interacted with in a seemingly real or physical way by a person using special electronic equipment, such as a gloves, earphones, and goggles fitted with sensors. Virtual reality can recreate sensory experiences, which include virtual taste, sight, smell, sound, and touch.

A language for describing 3D image sequences and possible user interactions to go with them. VRML enables building a sequence of visual images into Web settings with which a user can interact with.

A virtual receptionist is an phrase used in the business sense that refers to an individual who answers phones or performs the duties of an on-site receptionist, but is not actually located at the primary business’s location. Customer service representatives, answering service agents, and even appointment schedulers could all be classified as a virtual receptionist if they are working off-site or at a remote location. In the majority of cases, a virtual receptionist is working from a home office.