TheoryBook

TheoryBook is a line of TSUG laptop computers manufactured by Theorysonic. It is a high-end Theorysonic laptop computer.

History
TheoryBook was first released in May 14, 1986 as a battery-powered portable computer and bundles with Theorynet service. It has build-in trackball and keyboard.

Software
The TheoryDesk runs TSUG. The latest version is TSUG X7.