The PenPoint OS was one of the earliest operating systems written specifically for graphical tablets and personal digital assistants.
PenPoint OS ran on a number of Intel x86-powered tablet PCs including IBM's ThinkPad 700T series, NCR's 3125, 3130 and some of GRiD Systems' pen-based portables; it was later ported to the Hobbit chip in AT&T Corporation's EO Personal Communicator.
PenPoint won in the Standards and Operating Systems category in PC Magazine's 1991 Technical Excellence awards.
[2] The PenPoint operating system had novel early implementations of several computing advances, including: In April 2008, as part of a larger federal court case, the gesture features of the Windows/Tablet PC operating system and hardware were found to infringe on a patent by GO Corp. concerning user interfaces for the PenPoint OS.
[3] The novel user interface of PenPoint and the mobile form factor of pen computers inspired many startup software companies, including: