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GNO Multitasking Environment
DeveloperProcyon Enterprises,[1] Devin Reade
OS familyUnix-like
Source modelOpen source
Initial release1991; 28 years ago (1991)
Latest release2.0.6 / February 15, 1999; 20 years ago (1999-02-15)
Marketing targetPersonal computing
PlatformsApple IIGS

The GNO Multitasking Environment, also known as GNO/ME or GNO for short, is a Unix-like operating system for the Apple IIGS computer. It was developed by Procyon Enterprises and sold commercially from 1991 through August 1996, when it was released as freeware. Development continued by Devin Reade, who released the current version 2.0.6 on 15 February 1999.[2] The source code has since been released via GitHub.[3]


  1. ^ Procyon Enterprises
  2. ^ Subject: The End (and new Beginning) of GNO/ME, Date: Sun, 10 Aug 1997, A2Pro Forum, ...However, instead of simply stopping sales of GNO and letting the software wander into oblivion, I am placing GNO into "freeware" status, and I am also making available all source code to the 2.0.4 version to the public and the development community.....Speaking of that, the GNO-Devel list is headed by Devin Reade, and its members are programmers who have the time and devotion to continuing to develop the GNO system....Thank you all for your support in the past of my company and myself, and best wishes to you all for the future! Regards, Jawaid Bazyar President, Procyon Enterprises Inc. President, Interlink Advertising Services Inc.
  3. ^ "GNO/ME Source on GitHub".

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