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    1 day ago · Download as PDF Printable version In other projects Wikimedia Commons Wikibooks Wikinews Wikiversity Languages Language links are at the top of the page across from the title. Contents move to sidebarhide (Top) 1History 2Features Toggle Features subsection 2.1Browser extensions 2.2Themes 2.3Guest session 2.4Standards 3Security 4Localizations

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  3. 1 day ago · This list of most-downloaded Google Play applications includes most of the free apps that have been downloaded more than 500 million times, and most of the paid apps that have been downloaded more than one million times on unique Android devices.

    • yes marked with bold are necessary for the functioning of any Android device wishing to use any Google services
  4. 1 day ago · A computer program is a sequence or set of instructions in a programming language for a computer to execute. Computer programs are one component of software, which also includes documentation and other intangible components. [1] A computer program in its human-readable form is called source code.

    • Etymology
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    "Virtual" has had the meaning of "being something in essence or effect, though not actually or in fact" since the mid-1400s. The term "virtual" has been used in the computer sense of "not physically existing but made to appear by software" since 1959. In 1938, French avant-garde playwright Antonin Artaud described the illusory nature of characters ...

    One method by which virtual reality can be realized is simulation-based virtual reality. Driving simulators, for example, give the driver on board the impression of actually driving an actual vehicle by predicting vehicular motion caused by driver input and feeding back corresponding visual, motion and audio cues to the driver. With avatar image-ba...

    The development of perspective in Renaissance European art and the stereoscope invented by Sir Charles Wheatstone were both precursors to virtual reality. The first references to the more modern concept of virtual reality came from science fiction.


    The Virtual Reality Modelling Language (VRML), first introduced in 1994, was intended for the development of "virtual worlds" without dependency on headsets. The Web3D consortium was subsequently founded in 1997 for the development of industry standards for web-based 3D graphics. The consortium subsequently developed X3D from the VRML framework as an archival, open-source standard for web-based distribution of VR content. WebVR is an experimental JavaScript application programming interface (...


    Modern virtual reality headset displays are based on technology developed for smartphones including: gyroscopes and motion sensors for tracking head, body, and hand positions; small HDscreens for stereoscopic displays; and small, lightweight and fast computer processors. These components led to relative affordability for independent VR developers, and led to the 2012 Oculus Rift Kickstarter offering the first independently developed VR headset. Independent production of VR images and video ha...

    Display resolution

    Minimal Angle of Resolution (MAR) refers to the minimum distance between two display pixels. At the distance, viewer can clearly distinguish the independent pixels. Often measured in arc-seconds, MAR between two pixels has to do with the viewing distance. For the general public, resolution is about 30-65 arc-seconds, which is referred to as the spatial resolution when combined with distance. Given the viewing distance of 1m and 2m respectively, regular viewers won't be able to perceive two pi...

    Image latency and display refresh frequency

    Most small-size displays have a refresh rate of 60 Hz, which adds about 15ms of additional latency. The number is reduced to less than 7ms if the refresh rate is increased to 120 Hz or even 240 Hz and more. Participants generally feel that the experience is more immersive with higher refresh rates as a result. However, higher refresh rates require a more powerful graphics processing unit.

    Relationship between display and field of view

    In assessing the achieved immersion by a VR device, we need to consider our field of view (FOV) in addition to quality image. Our eyes have a horizontal FOV of about 140 degrees per side and a vertical FOV of roughly 175 degrees. Binocular vision is limited to 120 degrees horizontally where the right and the left visual fields overlap. Overall, we have a FOV of roughly 300 degrees x 175 degreeswith two eyes, i.e., approximately one third of the full 360-deg sphere.

    Virtual reality is most commonly used in entertainment applications such as video games, 3D cinema, amusement park rides including dark rides and social virtual worlds. Consumer virtual reality headsets were first released by video game companies in the early-mid 1990s. Beginning in the 2010s, next-generation commercial tethered headsets were relea...

    In June of 2020, Jean Michel Jarre performed in VRChat. In July, Brendan Bradley released the free FutureStages web-based virtual reality venue for live events and concerts throughout the 2020 shutdown, Justin Bieber performed on November 18, 2021 in WaveXR. On December 2, 2021 Non-Player Character performed at The Mugar Omni Theater with audiences...

    Health and safety

    There are many health and safety considerations of virtual reality. A number of unwanted symptoms have been caused by prolonged use of virtual reality, and these may have slowed proliferation of the technology. Most virtual reality systems come with consumer warnings, including: seizures; developmental issues in children; trip-and-fall and collision warnings; discomfort; repetitive stress injury; and interference with medical devices. Some users may experience twitches, seizures or blackouts...

    Children and teenagers in virtual reality

    Children are becoming increasingly aware of VR, with the number in the USA having never heard of it dropping by half from Autumn 2016 (40%) to Spring 2017 (19%). A 2022 research report by Piper Sandler revealed that only 26% of U.S. teens own a VR device, 5% use it daily, while 48% of teen headset owners "seldom" use it. Of the teens who don't own a VR headset, 9% plan to buy one. 50% of surveyed teens are unsure about the metaverseor don't have any interest, and don't have any plans to purch...


    The persistent tracking required by all VR systems makes the technology particularly useful for, and vulnerable to, mass surveillance. The expansion of VR will increase the potential and reduce the costs for information gathering of personal actions, movements and responses. Data from eye tracking sensors, which are projected to become a standard feature in virtual reality headsets,may indirectly reveal information about a user's ethnicity, personality traits, fears, emotions, interests, skil...

    Choi, SangSu, Kiwook Jung, and Sang Do Noh (2015). "Virtual reality applications in manufacturing industries: Past research, present findings, and future directions". Concurrent Engineering. 106329...

    Isaac, Joseph (2016). "Step into a new world – Virtual Reality (VR)". Retrieved 2 July 2016.Basic Concepts of Virtual Reality along with Research Challenges explained in simple words.
    Drummond, Katie (2014). "The Rise and Fall and Rise of Virtual Reality". The Verge. Retrieved 15 November 2014.Interviews on the history and future of virtual reality by leaders in the field.
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  6. 1 day ago · Download as PDF Printable version In other projects Wikimedia Commons Languages On this Wikipedia the language links are at the top of the page across from the article title. Go to top. Contents move to sidebarhide (Top) 1Naming and evolution 2Devices Toggle Devices subsection 2.1First generation 2.1.1Kindle 2.2Second generation 2.2.1Kindle 2

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