(1) (Plex Systems, Inc., Troy, MI)  A software company founded in 1995 that offers a cloud-based system geared to manufacturing.  The Plex software includes enterprise resource planning (ERP), operations management, quality control management, customer relationship management (CRM) and supply chain management.
(2) A media server and player from Plex, Inc.  Plex is used to organize music, photos and videos and runs as a Web server in the user's computer.  To view the media, the Plex player can be installed in personal computers, mobile devices and set-top boxes such as the Roku streaming hubs.  See 
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Roku.