(OS/2 Presentation Manager) The graphical user interface in OS/2 Version 1.x. Starting with Version 2.0, Presentation Manager was renamed Workplace Shell. See OS/2.
"OS/2 PM." YourDictionary, n.d. Web. 24 June 2018. <http://www.yourdictionary.com/os-2-pm>.
OS/2 PM. (n.d.). Retrieved June 24th, 2018, from http://www.yourdictionary.com/os-2-pm
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