Pansophic Systems (English Wikipedia)

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chicagoreader.com

Henderson, Harold (April 12, 1990). "Chi Tech: A Random Sample of Local Companies That Made Good". Chicago Reader. 19 (26). Archived from the original on December 8, 2021.

Storch, Charles (September 4, 1991). "$300 million takeover deal for Pansophic". Chicago Tribune: 3–1, 3-2 – via Newspapers.com.
Lazarus, George (January 5, 1978). "Computer software business isn't for softies". Chicago Tribune. p. 10 – via Newspapers.com.
Edgerton, Michael (May 26, 1980). "His game: Business". Chicago Tribune. p. 7 (Section 4) – via Newspapers.com.

Kauffold, Mary Peterson (August 4, 1991). "Software, yes; soft life, no: A retired heavy hitter in computers wants back into the game". Chicago Tribune: 1 – via ProQuest.
"Company makes cuts after deal". Austin American Statesman: F7. December 1, 1991 – via ProQuest.

"Pansophic Systems Calls Off Acquisition of SPSS". Computer Business Review. New Statesman Media Group. January 6, 1987. Archived from the original on April 19, 2021.

Henderson, Harold (April 12, 1990). "Chi Tech: A Random Sample of Local Companies That Made Good". Chicago Reader. 19 (26). Archived from the original on December 8, 2021.
"Pansophic Systems Calls Off Acquisition of SPSS". Computer Business Review. New Statesman Media Group. January 6, 1987. Archived from the original on April 19, 2021.