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Ceneca Communications, often misidentified as "Seneca",[1][2][3] was the original developer of the PageMill and SiteMill website publishing and maintenance applications, which were eventually released by Adobe Systems.[2][4]


Ceneca was incorporated on April 5, 1995 and based in Palo Alto, California.[4][5] Its unveiling of PageMill and SiteMill made a big impact in August 1995 at Macworld Expo in Boston,[6] being called the "PageMaker" of the web and the 90's.[7][8] Adobe then announced on September 18, 1995 that it was acquiring Ceneca.[4] After the acquisition, the company was dissolved on October 23, 1997.[5]


  1. Adobe PageMill 2.0, Centre for Computing History. Accessed 2019-11-06.
  2. 2.0 2.1 Why Adobe Doesn’t Understand Web Designers by Joshua Johnson, Design Shack. 2011-08-08.
  3. Adobe nostalgia: What a tangled Web we weave, The Graphic Mac. 2017-07-26.
  4. 4.0 4.1 4.2 Adobe Systems Plans to Acquire Ceneca Communications (PDF), Adobe Systems. 1995-09-18. Archived 1996-10-22.
  5. 5.0 5.1 Ceneca Communications, OpenCorporates. Accessed 2019-12-08.
  6. Adobe Buys Ceneca by Geoff Duncan, TidBITS. 1995-09-18.
  7. PageMill and SiteMill: HTML Tools for the Rest of Us by Tonya Engst, TidBITS. 1995-08-14.
  8. Macworld Boston August 8-11, 1995 by Scott J. Kleper. 1995-08.

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