Jet Propulsion Laboratory Display Information System: Difference between revisions

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{{Short description|File management program written in FORTRAN}}{{More citations needed|date=July 2025}}

{{Citations missing|date=December 2006}}

The '''Jet Propulsion Laboratory Display Information System''' (or '''JPLDIS''') is a file management program written in [[Fortran|FORTRAN]].

JPLDIS is important because it was the inspiration and precursor to [[dBASE]], arguably one of the most influential [[Database management system|DBMS]] programs for early microcomputers.<ref name="data based advisor" /><ref name="PC Week" />

== History ==

In the late 1960's1960s, Fred Thompson at the [[Jet Propulsion Laboratory]] (JPL) of the [[California Institute of Technology]] (CalTechCaltech) was using a Tymeshare[[Tymshare]] product named [[RETRIEVE]] to manage a database of electronic calculators. In 1971 Fred collaborated with Jack Hatfield, a programmer at JPL, to write an enhanced version of RETRIEVE which became the JPLDIS project. JPLDIS evolved into a file management program written in [[Fortran|FORTRAN]], running on a [[UNIVAC 1108]] mainframe. Jack Hatfield published two papers entitled "Jet Propulsion Laboratory Data Information System (JPLDIS)". The first paper was presented to the Univac Users Group in Dallas, TX (Feb. 1973) and the second paper was presented to the National Science Foundation conference on Data Storage and Retrieval Methods at the University of Missouri in Columbia, Missouri (July 1973). Jack Hatfield left JPL in 1974 and the JPLDIS project was assigned to Jeb Long, another programmer at JPL, who added many advanced features plus a programming language.

In 1978, while at JPL, [[Wayne Ratliff]] wrote a database program in assembly language for [[CP/M]] based microcomputers to help him win the football pool at the office. He based it on Jeb Long's JPLDIS and called it Vulcan, after Mr. Spock of Star Trek.

JPLDIS evolved into a file management program written in [[Fortran|FORTRAN]], running on a [[UNIVAC 1108]] mainframe. Hatfield published two papers entitled "Jet Propulsion Laboratory Data Information System (JPLDIS)". The first paper was presented to the Univac Users Group in Dallas, TX (Feb. 1973) and the second paper was presented to the National Science Foundation conference on Data Storage and Retrieval Methods at the University of Missouri in Columbia, Missouri (July 1973). Hatfield left JPL in 1974 and the JPLDIS project was assigned to Jeb Long, another programmer at JPL, who added many advanced features plus a programming language.

In late 1980, George Tate, of [[Ashton-Tate]], entered into a marketing agreement with Wayne Ratliff. Vulcan was renamed to dBase, the price was raised from $50 to $695, and the software quickly became a huge success.

In 1978, while at JPL, [[Wayne Ratliff]] wrote a database program in assembly language for [[CP/M]] based microcomputers to help him win the football pool at the office. He based it on Jeb Long's JPLDIS and called it Vulcan, after Mr. Spock of Star Trek. In late 1980, George Tate, of [[Ashton-Tate]], entered into a marketing agreement with Wayne Ratliff. Vulcan was renamed to dBase, the price was raised from $50 to $695, and the software quickly became a huge success.

According to the http://www.foxprohistory.org/ site, JPLDIS was the reason why Ashton-Tate lost a lawsuit against FoxPro and SCO FoxPro over copyrights used by FoxPro that were claimed to belong to Ashton-Tate and the dBase product. In December 11, 1990, Judge Hatter issued an order invalidating Ashton-Tate's copyrights in its own dBASE products.

When a number of "clones" of dBase appeared in the 1990s, Ashton-Tate sued one of them, [[FoxPro]], over copyrights. On December 11, 1990, Judge Hatter issued an order invalidating Ashton-Tate's copyrights in its own dBASE products.<ref name="foxpro"/> That ruling was based on a legal doctrine known as "[[unclean hands]]". Judge Hatter explained that Ashton-Tate knew that the dBase program development was based on JPLDIS, and that fact was kept hidden from the Copyright Office. <ref name="foxpro" />

== See also ==

*[[dBase]]
*[[Vulcan (programming language)]]

== References ==

{{Reflist|refs=

<ref name="foxpro">{{cite [web|access-date=December 21, 2010|url=http://www.foxprohistory.org/ashton_sues_fox.htm |title=The History of FoxPro - Ashton-Tate vs Fox Software]|archive-url=https://webcitation.org/5v9ZFwblS?url=http://www.foxprohistory.org/ashton_sues_fox.htm|archive-date=21 December 2010 |url-status=live }}</ref>

<ref name="data based advisor">{{cite journal|last=Hawkins|first=John L.|yeardate=March 1991|month=March|title=JPLDIS:dSTORY; how I Thereally firstdeveloped dBASE?. (a court decisionauthor findsof dBASE hadtells its origins inof the JPLDISdatabase public-___domainmanagement mainframesystem's programhistory)|journal=Data Based Advisor|volume=9|issue=3|page=9293|publisher=Advisor Publications, Inc.|issn=1090-6436|url=http://findwww.galegroupaccessmylibrary.com/gtxcoms2/infomark.do?&contentSet=IACsummary_0286-Documents&type=retrieve&tabID=T003&prodId=AONE&docId=A10480052&source=gale&srcprod=AONE&version=1.09229460_ITM|accessdateaccess-date=21 December, 2010}}</ref>

<ref name="PC Week">{{cite magazine|last=Moser|first=Karen D.|last2=Ould|first2=Andrew|date=17 December 1990|title=Court ruling turns table on A-T in dBASE battle. (Ashton-Tate's law suit against Fox Software Inc.)|magazine=PC Week|volume=7|issue=50|page=1|___location=New York, New York|issn=0740-1604|url=http://find.galegroup.com/gtx/infomark.do?&contentSet=IAC-Documents&type=retrieve&tabID=T003&prodId=AONE&docId=A9685703&source=gale&srcprod=AONE|access-date=21 December 2010}}</ref>

}}

[[Category:1973Computer-related introductions in 1973]]

[[Category:NASA online]]

[[Category:Proprietary database management systems]]

[[Category:1973 introductions]]