Jump to content

VPL Research: Difference between revisions

No edit summary
No edit summary
Line 12: Line 12:
}}
}}


'''VPL Research''' ('''Virtual Programming Languages''') was one of the first companies that developed and sold [[virtual reality]] products. It was founded by [[computer scientist]] [[Jaron Lanier]] and inventor [[Thomas G. Zimmerman]] in 1984.<ref name="wikipedia">VPL Research - Wikipedia</ref> The company pioneered commercial VR hardware and software during the 1980s and was the first firm to design, build, and sell integrated VR systems.<ref name="latimes">The New, Improved Reality - Los Angeles Times</ref> VPL Research played a pivotal role in the early development of virtual reality, with Lanier often credited with coining or popularizing the term "virtual reality".<ref name="vrs">VPL Research Jaron Lanier - Virtual Reality Society</ref>
'''VPL Research''' ('''Virtual Programming Languages''') was one of the first companies that developed and sold [[virtual reality]] products. It was founded by [[computer scientist]] [[Jaron Lanier]] and inventor [[Thomas G. Zimmerman]] in 1984.<ref name="wikipedia">VPL Research - Wikipedia. Retrieved from https://en.wikipedia.org/wiki/VPL_Research</ref> The company pioneered commercial VR hardware and software during the 1980s and was the first firm to design, build, and sell integrated VR systems.<ref name="latimes">Furger, Roberta. The New, Improved Reality. Los Angeles Times, July 21 1991. Retrieved from https://www.latimes.com/archives/la-xpm-1991-07-21-tm-264-story.html</ref> VPL Research played a pivotal role in the early development of virtual reality, with Lanier often credited with coining or popularizing the term "virtual reality".<ref name="vrs">VPL Research Jaron Lanier - Virtual Reality Society. (2017, July 13). Retrieved from https://www.vrs.org.uk/virtual-reality-profiles/vpl-research.html</ref>


==History==
==History==
VPL Research was founded in 1984 in a corner of Jaron Lanier's cottage in [[Palo Alto]], a city in the [[San Francisco Bay Area]].<ref name="vrs"/> The company quickly moved to offices on Bair Island Road in [[Redwood City]], California.<ref name="latimes"/> The acronym "VPL" stood for "Virtual Programming Languages," emphasizing the company's philosophy of treating human motion as a programming language.<ref name="proto">A Hero Behind the VR Headset - proto.life</ref>
VPL Research was founded in 1984 in a corner of Jaron Lanier's cottage in [[Palo Alto]], a city in the [[San Francisco Bay Area]].<ref name="vrs"/> The company quickly moved to offices on Bair Island Road in [[Redwood City]], California.<ref name="latimes"/> The acronym "VPL" stood for "Virtual Programming Languages," emphasizing the company's philosophy of treating human motion as a programming language.<ref name="proto">Pascucci, Valentina. A Hero Behind the VR Headset. proto.life, Sept 14 2021. Retrieved from https://proto.life/2021/09/a-hero-behind-the-vr-headset/</ref>


The company received seed capital from angel investors and partial funding from [[Marvin Minsky]], a renowned [[artificial intelligence]] pioneer.<ref name="wikipedia"/> This allowed VPL to blend counter-culture aesthetics with bleeding-edge computing technology.<ref name="proto"/>
The company received seed capital from angel investors and partial funding from [[Marvin Minsky]], a renowned [[artificial intelligence]] pioneer.<ref name="wikipedia"/> This allowed VPL to blend counter-culture aesthetics with bleeding-edge computing technology.<ref name="proto"/>
Line 21: Line 21:
In 1985, [[Young Harvill]] joined VPL as their fourth employee after licensing his Swivel 3D software to the company.<ref name="wikipedia"/> Harvill had created Swivel 3D in his spare time as a program for creating computer art that gave users the ability to generate virtual worlds on a [[Macintosh]] computer.<ref name="wikipedia"/>
In 1985, [[Young Harvill]] joined VPL as their fourth employee after licensing his Swivel 3D software to the company.<ref name="wikipedia"/> Harvill had created Swivel 3D in his spare time as a program for creating computer art that gave users the ability to generate virtual worlds on a [[Macintosh]] computer.<ref name="wikipedia"/>


The company filed for [[bankruptcy]] in 1990 due to chronic cash-flow problems and the high cost of complete VR systems.<ref name="wikipedia"/> During Chapter 11 proceedings, VPL pledged more than 20 patents as collateral, which were sold at discount to French defense contractor [[Thomson-CSF]] in 1992.<ref name="wired1993">Jaron - Wired Magazine</ref> In February 1998, [[Sun Microsystems]] announced it had acquired the patent portfolio and other technical assets of the former VPL Research Inc. from Thomson CSF and Greenleaf Medical.<ref name="sun">Sun buys VPL research - jaronlanier.com</ref> Under the agreement, Sun acquired the worldwide rights to more than a dozen key patents related to networked computer interaction, datagloves, computer wearables, image rendering, and VR programming standards, which were integrated into Sun's Java 3D API.<ref name="sun"/>
The company filed for [[bankruptcy]] in 1990 due to chronic cash-flow problems and the high cost of complete VR systems.<ref name="wikipedia"/> During Chapter 11 proceedings, VPL pledged more than 20 patents as collateral, which were sold at discount to French defense contractor [[Thomson-CSF]] in 1992.<ref name="wired1993">Levy, Steven. Jaron. Wired, Feb 1993. Retrieved from https://www.wired.com/1993/02/jaron</ref> In February 1998, [[Sun Microsystems]] announced it had acquired the patent portfolio and other technical assets of the former VPL Research Inc. from Thomson CSF and Greenleaf Medical.<ref name="sun">Sun buys VPL research. (1998, February). Retrieved from https://jaronlanier.com/sun.html</ref> Under the agreement, Sun acquired the worldwide rights to more than a dozen key patents related to networked computer interaction, datagloves, computer wearables, image rendering, and VR programming standards, which were integrated into Sun's Java 3D API.<ref name="sun"/>


==Products==
==Products==
Line 32: Line 32:
| '''[[DataGlove]]''' || An input device using a glove form factor || • Used fiber-optic bundles to track finger movements<br/>• ~256 positions per finger<br/>• 6502 microcontrollers<br/>• Wired to computer<br/>• Allowed manipulation of virtual objects<br/>• Featured on Scientific American cover (October 1987) || $10,000<ref name="wikipedia"/>
| '''[[DataGlove]]''' || An input device using a glove form factor || • Used fiber-optic bundles to track finger movements<br/>• ~256 positions per finger<br/>• 6502 microcontrollers<br/>• Wired to computer<br/>• Allowed manipulation of virtual objects<br/>• Featured on Scientific American cover (October 1987) || $10,000<ref name="wikipedia"/>
|-
|-
| '''[[EyePhone]]''' || Head-mounted display (HMD) || • Color LCD displays (320×240 per eye)<ref name="vrcompare">VPL EyePhone: Full Specification - VRcompare</ref><br/>• 108° field of view<ref name="vrcompare"/><br/>• 30 Hz refresh rate (5-6 fps in practice)<ref name="wikipedia"/><br/>• Used Fresnel lenses<br/>• 3-DoF head tracking capability || $6,000 (headset only)<ref name="virtualrealityshop">The Complete History of VR - VPL Research Inc - EP-01</ref>
| '''[[EyePhone]]''' || Head-mounted display (HMD) || • Color LCD displays (320×240 per eye)<ref name="vrcompare">VPL EyePhone: Full Specification - VRcompare. Retrieved from https://vr-compare.com/headset/vpleyephone</ref><br/>• 108° field of view<ref name="vrcompare"/><br/>• 30 Hz refresh rate (5-6 fps in practice)<ref name="wikipedia"/><br/>• Used Fresnel lenses<br/>• 3-DoF head tracking capability || $6,000 (headset only)<ref name="virtualrealityshop">The Complete History of VR - VPL Research Inc - EP-01. (2022, January 20). Virtual Reality Shop. Retrieved from https://www.virtual-reality-shop.co.uk/vpl-research-inc-ep-01/</ref>
|-
|-
| '''[[DataSuit]]''' || Full-body tracking suit || • 30+ joint sensors for measuring movement<ref name="proto"/><br/>• Tracked arms, legs, and trunk in real time<ref name="wikipedia"/><br/>• Developed circa 1989<ref name="vrarwiki">VPL Research - VR & AR Wiki</ref><br/>• Tailored for male and female anthropometrics || N/A
| '''[[DataSuit]]''' || Full-body tracking suit || • 30+ joint sensors for measuring movement<ref name="proto"/><br/>• Tracked arms, legs, and trunk in real time<ref name="wikipedia"/><br/>• Developed circa 1989<ref name="vrarwiki">VPL Research - VR & AR Wiki. Retrieved from https://vrarwiki.com/wiki/VPL_Research</ref><br/>• Tailored for male and female anthropometrics || N/A
|-
|-
| '''[[AudioSphere]]''' || 3D audio rendering system || • Real-time 3D sound rendering<br/>• Binaural spatialization<br/>• Created illusion of 3D sounds from all dimensions<ref name="vrs"/><br/>• Enhanced realism of virtual experiences || N/A
| '''[[AudioSphere]]''' || 3D audio rendering system || • Real-time 3D sound rendering<br/>• Binaural spatialization<br/>• Created illusion of 3D sounds from all dimensions<ref name="vrs"/><br/>• Enhanced realism of virtual experiences || N/A
|}
|}


The complete VPL system, including the computers required to run it (typically [[Silicon Graphics]] IRIS workstations), cost upwards of $250,000.<ref name="wikipedia"/><ref name="flashbak">Jaron Lanier's EyePhone: Head And Glove Virtual Reality In The 1980s - Flashbak</ref>
The complete VPL system, including the computers required to run it (typically [[Silicon Graphics]] IRIS workstations), cost upwards of $250,000.<ref name="wikipedia"/><ref name="flashbak">Jaron Lanier's EyePhone: Head And Glove Virtual Reality In The 1980s. (2014, November 24). Flashbak. Retrieved from https://flashbak.com/jaron-laniers-eyephone-head-and-glove-virtual-reality-in-the-1980s-26180/</ref>


===Software===
===Software===


====Body Electric====
====Body Electric====
Body Electric was a [[visual programming language]] used to control and program all other VPL components as part of the whole VPL virtual reality experience.<ref name="vrs"/> It was created by [[Chuck Blanchard]].<ref name="vplsoftware">VPL Software Lives! - jaronlanier.com</ref> According to Jaron Lanier, it was "a rare example of a successful visual programming language that is seductive at first approach, but also scales and has been used for industrial strength applications."<ref name="vplsoftware"/> The software allowed designers to prototype interactive worlds rapidly using gesture-based programming.<ref name="acm1991">Virtual Reality on Five Dollars a Day - ACM SIGCHI</ref>
Body Electric was a [[visual programming language]] used to control and program all other VPL components as part of the whole VPL virtual reality experience.<ref name="vrs"/> It was created by [[Chuck Blanchard]].<ref name="vplsoftware">VPL Software Lives! - Jaron Lanier. Retrieved from https://www.jaronlanier.com/vpl.html</ref> According to Jaron Lanier, it was "a rare example of a successful visual programming language that is seductive at first approach, but also scales and has been used for industrial strength applications."<ref name="vplsoftware"/> The software allowed designers to prototype interactive worlds rapidly using gesture-based programming.<ref name="acm1991">Lanier, J., Zimmerman, T. et al. Virtual Reality on Five Dollars a Day. Proceedings of ACM SIGCHI, 1991. Retrieved from https://www.cs.cmu.edu/~stage3/publications/91/conferences/sigchi/vrOnFiveDollarsADay/paper.html</ref>


====Isaac====
====Isaac====
Line 50: Line 50:


====Reality Built for Two (RB2)====
====Reality Built for Two (RB2)====
"Reality Built for Two" (RB2) was described as the first commercial multi-user VR system.<ref name="wikipedia"/> It was developed by Young Harvill along with Jaron Lanier and Chuck Blanchard.<ref name="ixdf">Author: Young Harvill | IxDF</ref> RB2 was marketed as a complete off-the-shelf VR system that linked Silicon Graphics IRIS renderers with Ethernet networking for shared virtual experiences.<ref name="streettech">VPL Research, Inc. - streettech.com</ref>
"Reality Built for Two" (RB2) was described as the first commercial multi-user VR system.<ref name="wikipedia"/> It was developed by Young Harvill along with Jaron Lanier and Chuck Blanchard.<ref name="ixdf">Author: Young Harvill. IxDF. Retrieved from https://www.interaction-design.org/literature/author/young-harvill</ref> RB2 was marketed as a complete off-the-shelf VR system that linked Silicon Graphics IRIS renderers with Ethernet networking for shared virtual experiences.<ref name="streettech">VPL Research, Inc. StreetTech. Retrieved from https://www.streettech.com/bcp/BCPgraf/StreetTech/VPL.html</ref>


====Swivel 3D====
====Swivel 3D====
Line 59: Line 59:
* '''[[Jaron Lanier]]''' - Founder and CEO. Often credited with coining or popularizing the term "virtual reality".<ref name="vrs"/> Hosted weekly jam sessions with VR gear and musical instruments, embodying his belief that computing should augment creativity.<ref name="wired1993"/>
* '''[[Jaron Lanier]]''' - Founder and CEO. Often credited with coining or popularizing the term "virtual reality".<ref name="vrs"/> Hosted weekly jam sessions with VR gear and musical instruments, embodying his belief that computing should augment creativity.<ref name="wired1993"/>


* '''[[Thomas G. Zimmerman]]''' - Co-founder and inventor of the DataGlove.<ref name="wikipedia"/> Co-authored the 1987 paper "A hand gesture interface device" presented at Graphics Interface 87.<ref name="researchgate">A hand gesture interface device - ResearchGate</ref>
* '''[[Thomas G. Zimmerman]]''' - Co-founder and inventor of the DataGlove.<ref name="wikipedia"/> Co-authored the 1987 paper "A hand gesture interface device" presented at Graphics Interface 87.<ref name="researchgate">Zimmerman, T. G., Lanier, J., Blanchard, C., Bryson, S., & Harvill, Y. (1987). A hand gesture interface device. ResearchGate. Retrieved from https://www.researchgate.net/publication/229067885_A_hand_gesture_interface_device</ref>


* '''[[Young Harvill]]''' - Joined as the fourth employee in 1985.<ref name="wikipedia"/> VP of Engineering at VPL. Created Swivel 3D and worked on RB2 and the DataGlove.<ref name="wikipedia"/><ref name="ixdf"/>
* '''[[Young Harvill]]''' - Joined as the fourth employee in 1985.<ref name="wikipedia"/> VP of Engineering at VPL. Created Swivel 3D and worked on RB2 and the DataGlove.<ref name="wikipedia"/><ref name="ixdf"/>


* '''[[Ann Lasko-Harvill]]''' - Chief designer of data suits at VPL Research.<ref name="awexr">Ann Lasko-Harvill Chief Designer of Data Suits at VPL - awexr.com</ref> Led development of wearables, tailoring the DataSuit for both male and female anthropometrics.<ref name="awexr"/>
* '''[[Ann Lasko-Harvill]]''' - Chief designer of data suits at VPL Research.<ref name="awexr">Ann Lasko-Harvill Chief Designer of Data Suits at VPL - awexr.com. Retrieved from https://www.awexr.com/hall-of-fame/24-ann-lasko-harvill</ref> Led development of wearables, tailoring the DataSuit for both male and female anthropometrics.<ref name="awexr"/>


* '''[[Chuck Blanchard]]''' - Software developer who created Body Electric visual programming language.<ref name="vplsoftware"/> Worked with Lanier on the Embrace visual programming language from 1988 to 1991.<ref name="wikipedia"/>
* '''[[Chuck Blanchard]]''' - Software developer who created Body Electric visual programming language.<ref name="vplsoftware"/> Worked with Lanier on the Embrace visual programming language from 1988 to 1991.<ref name="wikipedia"/>


* '''[[Jean-Jacques Grimaud]]''' - Co-founder, President, and VP of Engineering.<ref name="grimaud">Jean-Jacques Grimaud LinkedIn Profile</ref> Engineer who worked on multiple VPL patents including motion sensors and position tracking systems.<ref name="patents">Patents Assigned to VPL Research Inc. - Justia Patents Search</ref>
* '''[[Jean-Jacques Grimaud]]''' - Co-founder, President, and VP of Engineering.<ref name="grimaud">Jean-Jacques Grimaud LinkedIn Profile. Retrieved from http://www.linkedin.com/pub/jean-jacques-grimaud/0/35/54/en</ref> Engineer who worked on multiple VPL patents including motion sensors and position tracking systems.<ref name="patents">Patents Assigned to VPL Research Inc. - Justia Patents Search. Retrieved from https://patents.justia.com/assignee/vpl-research-inc</ref>


* '''[[Jeff Wright]]''' - Worked with Lanier and Blanchard on the Embrace visual programming language from 1988 to 1991.<ref name="wikipedia"/>
* '''[[Jeff Wright]]''' - Worked with Lanier and Blanchard on the Embrace visual programming language from 1988 to 1991.<ref name="wikipedia"/>
Line 73: Line 73:
* '''[[Mitch Altman]]''' - Joined VPL part-time to help program the 6502 microcontrollers for the DataGlove.<ref name="wikipedia"/>
* '''[[Mitch Altman]]''' - Joined VPL part-time to help program the 6502 microcontrollers for the DataGlove.<ref name="wikipedia"/>


* '''[[Timothy Leary]]''' - After his release from prison, worked with VPL as a consultant to explore consciousness through virtual reality.<ref name="leary">Timothy Leary VPL Research - Virtual Reality History</ref>
* '''[[Timothy Leary]]''' - After his release from prison, worked with VPL as a consultant to explore consciousness through virtual reality.<ref name="leary">Timothy Leary VPL Research - Virtual Reality History. Retrieved from https://www.vrhistory.com/timothy-leary-vpl</ref>


==Corporate Culture==
==Corporate Culture==
Line 86: Line 86:
* '''[[General Motors]]''' - Employed DataGlove and VR systems for ergonomic studies and automotive design
* '''[[General Motors]]''' - Employed DataGlove and VR systems for ergonomic studies and automotive design
* '''[[U.S. Olympic Committee]]''' - Utilized DataSuit for sports performance analysis and training
* '''[[U.S. Olympic Committee]]''' - Utilized DataSuit for sports performance analysis and training
* '''Medical institutions''' - Used VPL technology for surgical rehearsal and medical visualization<ref name="computerlaw">The Law of Virtual Reality - Computerlaw Group</ref>
* '''Medical institutions''' - Used VPL technology for surgical rehearsal and medical visualization<ref name="computerlaw">The Law of Virtual Reality. Computerlaw Group LLP, 1991. Retrieved from https://www.computerlaw.com/articles/the-law-of-virtual-reality/</ref>


===Entertainment and Education===
===Entertainment and Education===
Line 94: Line 94:
==Patents==
==Patents==
VPL Research held numerous pioneering patents related to virtual reality technology, including:
VPL Research held numerous pioneering patents related to virtual reality technology, including:
* Motion sensors for detecting hand and body movements<ref name="googlepatents">US5097252A - Motion sensor which produces an asymmetrical signal - Google Patents</ref>
* Motion sensors for detecting hand and body movements<ref name="googlepatents">US5097252A - Motion sensor which produces an asymmetrical signal in response to symmetrical movement. Google Patents. Retrieved from https://patents.google.com/patent/US5097252</ref>
* Data flow networks for virtual world creation
* Data flow networks for virtual world creation
* Head-mounted display technologies
* Head-mounted display technologies
Line 105: Line 105:


===Mattel Power Glove===
===Mattel Power Glove===
VPL licensed the DataGlove technology to [[Mattel]], which used it to create the [[Power Glove]] for the [[Nintendo Entertainment System]].<ref name="wikipedia"/> Based on VPL's $10,000 DataGlove, Mattel rushed its $90 Power Glove to market, becoming "one of the hottest gift items of the 1989 holiday season" and selling 1.3 million units worldwide.<ref name="wikipedia"/> The Power Glove introduced affordable motion input to millions of gamers, albeit with limited functionality.<ref name="powerglove">Power Glove - Wikipedia</ref>
VPL licensed the DataGlove technology to [[Mattel]], which used it to create the [[Power Glove]] for the [[Nintendo Entertainment System]].<ref name="wikipedia"/> Based on VPL's $10,000 DataGlove, Mattel rushed its $90 Power Glove to market, becoming "one of the hottest gift items of the 1989 holiday season" and selling 1.3 million units worldwide.<ref name="wikipedia"/> The Power Glove introduced affordable motion input to millions of gamers, albeit with limited functionality.<ref name="powerglove">Power Glove. Wikipedia. Retrieved from https://en.wikipedia.org/wiki/Power_Glove</ref>


===The Lawnmower Man===
===The Lawnmower Man===
Line 111: Line 111:


===Scientific American Coverage===
===Scientific American Coverage===
The VPL DataGlove was brought to market in 1987, and in October of that year it appeared on the cover of [[Scientific American]].<ref name="britannica">VPL DataGlove | device | Britannica</ref> This mainstream scientific publication coverage helped legitimize VR as a serious technology rather than science fiction.
The VPL DataGlove was brought to market in 1987, and in October of that year it appeared on the cover of [[Scientific American]].<ref name="britannica">VPL DataGlove | device | Britannica. Retrieved from https://www.britannica.com/technology/VPL-DataGlove</ref> This mainstream scientific publication coverage helped legitimize VR as a serious technology rather than science fiction.


==Legacy==
==Legacy==
Line 117: Line 117:


* '''Terminology''' - Jaron Lanier popularized—and arguably coined—the phrase "virtual reality," cementing VPL's place in technology history<ref name="latimes"/>
* '''Terminology''' - Jaron Lanier popularized—and arguably coined—the phrase "virtual reality," cementing VPL's place in technology history<ref name="latimes"/>
* '''Patent lineage''' - Sun's 1998 acquisition folded VPL IP into Java 3D, influencing successors such as OpenVR, WebVR, and modern VR standards<ref name="hpcwire">Sun Acquires VR & Networked 3D Graphics Patent - HPCwire</ref>
* '''Patent lineage''' - Sun's 1998 acquisition folded VPL IP into Java 3D, influencing successors such as OpenVR, WebVR, and modern VR standards<ref name="hpcwire">Sun Acquires VR & Networked 3D Graphics Patent. HPCwire, Feb 27 1998. Retrieved from https://www.hpcwire.com/1998/02/27/sun-acquires-vr-networked-3d-graphics-patent/</ref>
* '''Consumer VR''' - The Power Glove spin-off introduced motion-controlled gaming to the mass market
* '''Consumer VR''' - The Power Glove spin-off introduced motion-controlled gaming to the mass market
* '''Software legacy''' - Many of the first examples of VR applications were created using VPL software, including vehicle simulators at NASA and Boeing<ref name="vplsoftware"/>
* '''Software legacy''' - Many of the first examples of VR applications were created using VPL software, including vehicle simulators at NASA and Boeing<ref name="vplsoftware"/>
Line 147: Line 147:
<ref name="awexr">Ann Lasko-Harvill Chief Designer of Data Suits at VPL. AWEXR. Retrieved from https://www.awexr.com/hall-of-fame/24-ann-lasko-harvill</ref>
<ref name="awexr">Ann Lasko-Harvill Chief Designer of Data Suits at VPL. AWEXR. Retrieved from https://www.awexr.com/hall-of-fame/24-ann-lasko-harvill</ref>
<ref name="researchgate">Zimmerman, T. G., Lanier, J., Blanchard, C., Bryson, S., & Harvill, Y. (1987). A hand gesture interface device. ResearchGate. Retrieved from https://www.researchgate.net/publication/229067885_A_hand_gesture_interface_device</ref>
<ref name="researchgate">Zimmerman, T. G., Lanier, J., Blanchard, C., Bryson, S., & Harvill, Y. (1987). A hand gesture interface device. ResearchGate. Retrieved from https://www.researchgate.net/publication/229067885_A_hand_gesture_interface_device</ref>
<ref name="patents">Patents Assigned to VPL Research Inc. Justia Patents Search. Retrieved from https://patents.justia.com/assignee/vpl-research-inc</ref>
<ref name="patents">Patents Assigned to VPL Research Inc. - Justia Patents Search. Retrieved from https://patents.justia.com/assignee/vpl-research-inc</ref>
<ref name="googlepatents">US5097252A - Motion sensor which produces an asymmetrical signal in response to symmetrical movement. Google Patents. Retrieved from https://patents.google.com/patent/US5097252</ref>
<ref name="googlepatents">US5097252A - Motion sensor which produces an asymmetrical signal in response to symmetrical movement. Google Patents. Retrieved from https://patents.google.com/patent/US5097252</ref>
<ref name="britannica">VPL DataGlove. Britannica. Retrieved from https://www.britannica.com/technology/VPL-DataGlove</ref>
<ref name="britannica">VPL DataGlove. Britannica. Retrieved from https://www.britannica.com/technology/VPL-DataGlove</ref>