Glossary of tech terms

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Blu-ray Disc
(BD) A next-generation optical disc format meant for high-density storage of high-definition video and data. A Blu-ray Disc can store substantially more data than a DVD, because of the More…
Chip Card
A standard-sized plastic card that contains an integrated circuit or 'chip' which gives the card the ability to store and/or process data. Chip cards are of three different kinds: More…
Closed-Circuit Television
(CCTV) The use of television cameras for surveillance. It differs from broadcast television in that all components are directly linked via cables or other direct means. CCTV is often used More…
Digital Projector
An electro-optical machine which converts image data from a computer or video source to a bright image which is then imaged on a distant wall or screen using a lens system. A typical More…
Electronic Paper
Electronic paper (e-paper) or e-ink uses a display technology to imitate the appearance of ordinary ink on paper. Unlike conventional backlit flat panel displays such as LCD which emit More…
Fingerprint Identification
The oldest method of biometric techniques which has been successfully used in numerous applications. A fingerprint is made of a series of ridges and furrows on the surface of the finger. More…
Global Positioning System
(GPS) A satellite navigation system used for determining one's precise location and providing a highly accurate time reference almost anywhere on Earth or in Earth orbit. It uses an More…
High Density Digital Versatile Disc
(HD DVD; High Definition Digital Video Disc) A digital optical media format which can hold high definition video or other data. HD DVD has a single-layer capacity of 15 GB and a dual-layer More…
Holographic Versatile Disc
(HVD) An optical disc technology still in the research stage which would greatly increase storage over Blu-ray and HD DVD optical disc systems. HVDs have the capacity to hold up to 3.9 More…
Hybrid Drive
A type of computer hard disk drive that integrates a large buffer using non-volatile memory or even a small solid-state drive (SSD). The hybrid drive in its normal state has its platters at More…
Light Emitting Diode
(LED) A semiconductor device that emits incoherent narrow-spectrum light when electrically biased in the forward direction. This effect is a form of electroluminescence. The color of the More…
Near Field Communication
(NFC) A set of short-range wireless technologies that allows for simplified transactions, data exchange, and connections between certified devices with a touch. NFC operates at 13.56 MHz and More…
Network IP Camera
A stand-alone device which allows users to view live, full motion video from anywhere on a computer network, even over the Internet, using a standard web-browser. Businesses and homes are More…
Radio Frequency IDentification
(RFID) A method of storing and remotely retrieving data using devices called RFID tags or transponders. An RFID tag is a small object that can be attached to or incorporated into a product, More…
Speed Gun
A speed gun, also radar gun, is a device used to detect the speed of moving objects, including vehicles, pitched baseballs, runners and other moving objects. Speed guns consist of a radio More…
Touchscreen
(touch panel, touchscreen panel) A display overlay which is typically either pressure-sensitive (resistive), electrically-sensitive (capacitance), acoustically-sensitive (SAW - surface More…
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