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Iverson Software Inc. was founded in February 1990 by [[Eric Iverson]], with the intention of offering an improved version of [[SHARP APL/PC]]. By this time Eric's father [[Ken Iverson|Ken]] had begun work with [[Roger Hui]] on the language [[J]] (in fact, the first public demo of J was also held in February 1990); the pair joined Iverson Software in May of that year. Eric adapted his SHARP [[session]] manager to work with Hui's J implementation, and J was first released at [[APL90]] in August 1990. Plans for a SHARP APL product were soon discarded. In 1994, the company hired [[Chris Burke]] to work on J's environment and libraries. In April 2000, it changed its name to Jsoftware; while the name Iverson Software Inc. is no longer used, it remains in the prefix "isi" used for some J tools.<ref>[[Roger Hui|Hui, Roger]]. [http://keiapl.org/rhui/remember.htm "Remembering Ken Iverson"]. November 2004.</ref> | Iverson Software Inc. was founded in February 1990 by [[Eric Iverson]], with the intention of offering an improved version of [[SHARP APL/PC]]. By this time Eric's father [[Ken Iverson|Ken]] had begun work with [[Roger Hui]] on the language [[J]] (in fact, the first public demo of J was also held in February 1990); the pair joined Iverson Software in May of that year. Eric adapted his SHARP [[session]] manager to work with Hui's J implementation, and J was first released at [[APL90]] in August 1990. Plans for a SHARP APL product were soon discarded. In 1994, the company hired [[Chris Burke]] to work on J's environment and libraries. In April 2000, it changed its name to Jsoftware; while the name Iverson Software Inc. is no longer used, it remains in the prefix "isi" used for some J tools.<ref>[[Roger Hui|Hui, Roger]]. [http://keiapl.org/rhui/remember.htm "Remembering Ken Iverson"]. November 2004.</ref> | ||
Ken Iverson died in 2004, leaving Eric, Hui, and Burke as owners of Jsoftware. In | Ken Iverson died in 2004, leaving Eric, Hui, and Burke as owners of Jsoftware. In 2011, Hui joined [[Dyalog Ltd.]], reducing his involvement in J development. J was made open source in March 2011.<ref>[[Eric Iverson|Iverson, Eric]]. [http://www.jsoftware.com/pipermail/programming/2011-March/022121.html "J Source GPL"]. 2011-03-02.</ref> | ||
In 2012 [[Marshall Lochbaum]], then a summer intern at [[wikipedia:Thomasnet|ThomasNet]], began work on a modification of [[Chris Burke]]'s JDB database management system to add more powerful features such as joins. [[Eric Iverson]] soon joined the project and Jsoftware negotiated with ThomasNet to obtain copyright ownership. JD, or JDB+, was announced on July 23, 2012 at the Jsoftware conference.<ref>[[Eric Iverson|Iverson, Eric]]. "JD (JDB+) announcement". [https://code.jsoftware.com/wiki/Community/Conference2012 Jsoftware Conference 2012]. 2012-07-23.</ref> Now called Jd, it is maintained and sold by Jsoftware.<ref>Jsoftware. [https://code.jsoftware.com/wiki/Jd/Index "Jd/Index"].</ref> | In 2012 [[Marshall Lochbaum]], then a summer intern at [[wikipedia:Thomasnet|ThomasNet]], began work on a modification of [[Chris Burke]]'s JDB database management system to add more powerful features such as joins. [[Eric Iverson]] soon joined the project and Jsoftware negotiated with ThomasNet to obtain copyright ownership. JD, or JDB+, was announced on July 23, 2012 at the Jsoftware conference.<ref>[[Eric Iverson|Iverson, Eric]]. "JD (JDB+) announcement". [https://code.jsoftware.com/wiki/Community/Conference2012 Jsoftware Conference 2012]. 2012-07-23.</ref> Now called Jd, it is maintained and sold by Jsoftware.<ref>Jsoftware. [https://code.jsoftware.com/wiki/Jd/Index "Jd/Index"].</ref> | ||