PTSUG

PTSUG (formerly Portosic OS) is a mobile operating system created and developed by Theorysonic for TheoryPhone, TheoryPhone Mini, Portosic Touch, TheoryTablet Mini and TheoryTablet devices.

Originally unveiled in 1996 for the TheoryPhone and TheoryPDA(as replacement for old TS-UGOS for Pen Computing), PTSUG has been extended to support other Theorysonic devices such as the Blue King Color (1996), TheoryPDA Style (March 1999), Portosic Touch (January 2005) and the TheoryTablet (January 2006).

History
The development of Portosic OS for TheoryPhone dates back to 1994.

Features

 * Red Star web browser.
 * TheorySync
 * TheoryMusic
 * TheoryMedia

Version history

 * Portosic OS (1996)
 * Portosic OS 2 (1999)
 * Portosic OS 3 (2002)
 * Portosic OS 4 (2004)
 * Portosic OS X (2006)
 * Portosic OS X2 (2008)
 * Portosic OS X3 (2010)
 * Portosic OS X3.5 (2011)
 * Portosic OS X4 (2012)
 * Portosic OS X5 (2014)
 * Portosic OS X6 (2016)
 * PTSUG X7 (2017)

Reception
The PTSUG has positive reviews and commercially successful. It has huge library of games and software.

Usage share
PTSUG is the popular mobile operating system.