Go's Penpoint is not compatible with existing personal computer operating systems.

The penpoint gunnel can breathe air when out of water.

A person using Go's Penpoint software will see what looks like a notebook with tabs.

The penpoint gunnel varies in shades of green, maroon, or brown.

Go's Penpoint is an entirely new operating system that is not compatible with existing software.

Several analysts contend that Penpoint, although it is specifically aimed at pen-based systems, will exert powerful forces on the computing universe by the mid-1990's.

Twenty-two software companies also introduced almost 50 programs designed to run with Penpoint, including calendars, word processors, spreadsheets and even computerized photo albums.

Shortly thereafter, PenPoint was discontinued, ending that market for SmartSketch.

I.B.M. has already said it will use Go's Penpoint software in its pen-based machines.

The PenPoint operating system and nine bundled applications are included in ROM.

SmartSketch was a drawing application for pen computers running the PenPoint OS.

I.B.M. is licensing Go's software and said it would have a portable, tablet-like computer ready for Penpoint late this year.

Perhaps the most interesting part was the operating system, PenPoint OS, created by GO Corporation.

This has led to the emergence of a number of commercial pen-based systems, such as PenWindows, Paragraph and PenPoint.

Microsoft releases Windows for Pen Computing as a response to the PenPoint OS.

The novel user interface of PenPoint and the mobile form factor of pen computers inspired many startup software companies, including:

Byte magazine awarded PenPoint best Operating System in the 1992 Byte Awards.

The PenPoint OS was a special operating system which incorporated gesture recognition and handwriting input at all levels of the operating system.

AT&T introduced the EO Personal Communicator combining PenPoint with wireless communications.

Robert Carr (born 1956) is credited as the architect of GO Corporation's PenPoint OS.

Go and Penpoint compete with Microsoft's Windows for Pen Computing, popularly called Pen Windows.

Jerry Kaplan, the chairman of Go, said his Penpoint 386 operating system will be ready in March, and Pen Windows has been promised for spring as well.

The company's first product was SmartSketch, a drawing program for the PenPoint OS and EO tablet computer.

PenPoint won in the Standards and Operating Systems category in PC Magazine's 1991 Technical Excellence awards.