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[[Image:EMHMarkI.jpg|thumb|rightleft|200px|The EMH Mark 1.]]

A hologram was is a construction computer-generated image, made three-dimensional by employing the use of [[Particles#Photon|photons]], [[Force field|force fields]], and [[holomatterHolographic Projector|projected by special equipment]] created inside that can usually only function on a [[holodeck]], or in a [[holosuite]]. Projected light and energy can be held within a containment field in order to give a programmed or desired appearance, or by another type of holographic projectoras well as provide a solid surface so that matter did not pass through. Holograms could can be manipulated by advanced locations, objects, animals, or people. Pre-made holograms are called [[computerholography|holo]] -programs.   At the core of every piece of programming is a matrix, and [[holography]] is no different. In all matters that had to do with holograms, the heart of the program or its interface is commonly referred to as the "holo-matrix." This term is interchangeable whether one is talking about the core of a [[holodeck]] or the base of a [[hologram]]'s specific programming. Typically, allowing people to interact design a hologram or holographic setting, one starts with a template or a psychological profile. Once the inanimate objectsbasic idea is generated, it can be modified in certain areas independently of others, for example, changing a character's sense of humor does not affect its hair color. Holograms When one is done editing, security features can also be projected into spaceinstalled in order to prevent other people from tampering with the program.  Most hologram programming does not support long-term use. If a program runs continuously, it is highly possible that it can suffer from memory core fragmentation. <br>In order to keep a holographic program from deteriorating, one must save and exit the program periodically.   Highly advanced holoprograms, such as [[Emergency Medical Hologram|Emergency Medical Holograms]], were even are considered sentient beings in their own right.<br> The first hologram who was able to exercise its true sentience was the [[Emergency Medical Hologram#The Doctor|EMH]] of the [[USS Voyager]].    === Known History ===* Holograms were made by different cultures over history. The [[Xyrillian]]s were the first race known to [[Human]]s to possess such technology. * In the [[23rd century]], the [[Federation]] had [[holographic]] "imagers," but their resolution was less accurate than the technology that would be developed in the [[24th century]].  * Holographic recorders that captured motion were common by [[2348]].  * By the [[2250s]], some [[Starfleet]] vessels used early [[Holographic Projector|holo-communicators]]. While the technology fell out of use in the following decades, a more advanced version came into use again in the [[2370s]]. <br>(Outside of the [[Federation]], [[Klingon]]s and [[Romulan]]s were documented to occasionally use holo-communicators.)  * When the Federation banned the use of, and research into, synthetic life following the attack on [[Mars]] in [[2385]], the ban did not apply to holograms. The Starfleet Archive Museum made use of a holographic archivist as late as [[2399]].  * By the [[24th century]], [[holodeck]]s were a standard part of Federation life. * The first hologram to attain documented "true sentience" was a simulation of Sherlock Holmes' villain James Moriarty. * [[Doctor|Dr.]] [[Lewis Zimmerman]] created a highly advanced hologram known as the [[Emergency Medical Hologram]], or "EMH" for short. These holograms were meant to be used for a short period of time, should medical staff need help, or if one was absent.  * The first hologram able to truly exercise its sentience was the [[The Doctor]], the EMH of the [[USS Voyager]].     ''See also'':* [[Holography]]* [[Holodeck]]* [[Holosuite]]* [[Holographic Projector]]* [[Hologenerator]]* [[Mobile emitter]]* [[Isolation suit]]* [[Particle synthesis]]* [[Duck blind]]  <br>