Portosic OS 4

The Portosic OS 4 was released on October 18, 2004 by Theorysonic.

Features

 * New user interface and theme to make TS-UGOS TEN style.
 * USB 1.1 support with mass storage.
 * Added support for Portosic Touch.
 * It is the last version to support TheoryPhone IIc.