doppelgänger Glossary

A doppelgänger is the ghostly double of a living person, a sinister form of bilocation. In the vernacular, the word "doppelgänger" has come to refer (as in German) to any double or look-alike of a person. They are generally regarded as harbingers of bad luck. In some traditions, a doppelgänger seen by a person's friends or relatives portends illness or danger, while seeing one's own doppelgänger is an omen of death, or results in immediate death upon the two coming face to face.
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An avatar (from the Sanskrit word for 'a form of self', commonly used in many Indian languages) is a computer user's representation of himself or herself or alter ego, in the form of a three-dimensional model used in computer games, a two-dimensional icon (picture) used on Internet forums and other communities, or a text construct found on early systems. It is an 'object' representing the embodiment of the user.
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The term autoscopy derives from the Greek words autos (self) and skopeein (to see). It refers to an experience in which a person, while believing him or her self to be awake, sees their body and the world from a location outside their physical body. Autoscopy experiences are characterized by the presence of disembodiment, the impression of seeing the world from an elevated and distanced visuo-spatial perspective and the impression of seeing one's own body from this perspective.
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Machinima (pronounced ma-shin-ee-ma) is the use of real-time, three-dimensional (3D) graphics-rendering engines to generate computer animation. The term also refers to works that incorporate this animation technique.  The more general term machinima, a misspelled portmanteau of machine cinema, has spread beyond games and software to mainstream media, including television series and advertisements.
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A QR Code is a matrix code (or two-dimensional bar code) created by Japanese corporation Denso-wave in 1994.  The 'QR' is derived from 'Quick Response', as the creator intended the code to allow its contents to be decoded at high speed.  QR Codes storing addresses and URLs may appear in magazines, on signs, buses, business cards or any object about which users might need information. Users with a camera phone equipped with the correct reader software can scan the image of the QR Code causing the phone's browser to launch and be redirected to the programmed URL.
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Second Life (SL) is a virtual world developed by Linden Lab that launched on June 23, 2003 and is accessible via the Internet. A free client program called the Second Life Viewer enables its users, called Residents, to interact with each other through avatars. Residents can explore, meet other residents, socialize, participate in individual and group activities, and create and trade virtual property and services with one another, or travel throughout the world, which residents refer to as the grid. Second Life is for people aged 18 and over, while Teen Second Life is for people aged 13 to 17.
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