Third Generation. Often describing the third generation of cell-phone technology.
Four dimensional. Usually refers to the three spatial dimensions plus time. Also infers animated or moving 3D images.
A display and television standard of approximately twice as many pixels as HDTV (see).
A wireless networking standard, typically called WiFi (Wireless Fidelity). Common varieties include A, B, G, N, and AC. Connections may be open or encrypted.
WiFi is typically used in homes, commercial establishments, and in public spaces, as it provides connections at a distance of up to 100 meters. Many devices connect to WiFi, including computers, mobile devices, printers, and cameras.
A display and television standard of approximately four times as many pixels as HDTV (see).
Association for Computing Machinery. Sponsor of many computer and computer graphics conferences, including SIGGRAPH. (Special Interest Group; Graphics.
Accelerated Graphics Port. A bus used to connect image generators in personal computers.
American National Standards Institute.
Advanced Research Projects Agency. Formerly DARPA (DefenseARPA). US DoD agency responsible for funding advanced research projects in many areas. Now again called DARPA (see)
Army Research Lab (US). Headquartered in Adelphi, MD.
Close Combat Tactical Trainer. US Army second generation virtual trainer. See SIMNET.
Computer Graphics/Computer Graphics Imagery.
Computer Human Interface. ACM group conference on the discipline is SIGCHI.
Central Processing Unit. The core logic/processing unit of a computer.
Cathode Ray Tube. The largely obsolete display component of TVs and computer monitors prior to the 2000's.
Defense Advanced Research Projects Agency. Formerly ARPA (see). US DoD agency responsible for funding advanced research projects in many areas.
Distributed Interactive Simulation. Communication protocol for military simulations developed in the 1990's.
Department of Defense (USA).
Degrees Of Freedom. Used to discuss motion and tracking capabilities.
Defense Modeling and Simulation Coordination Office
Digital Signal Processor. Used to process sound, video, and other signal data.
Electronic Frontiers Foundation. A group lobbying and working for freedom for electronic communications equivalent to that of other forms of communication.
European Space Agency. The European Union's equivalent to the United State' NASA.
Federal Aviation Administration (US).
Federal Communications Commission (US).
Force Feedback. Also known as a force display.
Floating Point Operations Per Second. A measure of computing speed. Often, MFLOPS, GFLOPS, or TFLOPS (Mega-, Giga-, Tera-FLOPS)
Field of View. A characteristic measurement of display system image size.
Frames per Second. A measure of computing and display performance.
GigaByte. One billion bytes, or characters. A measurement of memory and storage capacity.
Geographical Information Systems. Computerized maps and related programs and databases.
Graphics Language. A standard for specifying 3D objects for computer display.
High Definition Television. A standard for broadcast television, often used to describe display system pixel density. True HDTV provides 1920 horizontal pixels and 1020 vertical pixels, for a total of 2,073,600 pixels. (Also called 2K TV – the approximate number of horizontal pixels.)
Newer versions of displays are described as multiples of HDTV. 4K TV provides approximately twice as many Pixels. 8K TV provides roughly four times as many pixels.
Human Interface Technology Laboratory (HITL), at the University of Washington in Seattle, USA. A pioneer location for xR.
High-level Architecture. A networked simulation standard used primarily in military simulation. Superceded DIS and SIMNET.
Head Mounted Display. Also, headset, goggles.
Head-Up Display. A display shown on a transparent surface that allows data to be superimposed on a view of the real world. Typically not attached to the viewer, such as part of an vehicle dashboard.
Hertz, cycles per second.
Institute of Electrical and Electronics Engineer. An internationally-recognized standards-setting organization.
Institute for Simulation and Training, Orlando, Florida, USA. A program of the University of Central Florida (UCF).
Johnson Space Center, NASA's Houston, Texas, USA headquarters.
Jet Propulsion Laboratory, NASA facility based in Pasadena, California (USA).
Location Based Entertainment.
Megahertz: I million cycles per second.
Musical Instrument Digital Interface. A technology for controlling instruments, and other devices by computer.
Millions of Instructions Per Second. A measure of computing speed and power.
Massachusetts Institute of Technology.
Motion Pictures Expert Group, A standards setting organization. Deals with the coding of multimedia information. Also MP3, MP4, variations of the original MPEG standard.
National Aeronautics and Space Agency (USA).
National Science Foundation (USA).
Naval Postgraduate School (USA). Located in Monterrey, Califonia.
Organic Light-Emitting Diode. A flat, flexible display technology.
Picture Element. The basic building block of a graphic display, and the unit in which display resolution is usually expressed.
Polygons, the basic building blocks of 3D models. Graphics performance for VR is sometimes expressed in Polys per second.
Research and development.
Society for Computer Simulation.
Special Interest Group, Graphics. A sub-group of ACM (see). Also, the annual conference of the same name.
Simulation Networking. A demonstration project and training system of the US DoD, Army and ARPA developed in the mid-1990's.
Program Executive Office for Simulation, Training and Instrumentation. US Army program for simulation and training.
Terabyte: One trillion bytes, or characters. A measurement of memory and storage capacity.
Tactile Feedback. Also referred to as tactile displays.
Universal Serial Bus. A fast serial bus used in personal computers. For connecting external peripherals. Successor to RS-232 standard for serial data transmission.
A computer operating system, originally developed by AT&T. Predecessor to LINUX, which is open source.
VR, VE, VW
Virtual Reality, Virtual Environments, Virtual Worlds. Collectively, xR (see).
A collective term for augmented, virtual, and mixed reality. Note that the "x" is lower case, denoting an unknown variable.