The tablet computer and the associated special operating software is an example of pen computing technology, and thus the development of tablets has deep historical roots.
The depth of these roots can be quite surprising to people who are only familiar with current commercial products. For example, the first patent for an electronic tablet used for handwriting was granted in 1888. The first patent for a system that recognized handwritten characters by analyzing the handwriting motion was granted in 1915.
The first publicly demonstrated system using a tablet and handwriting text recognition instead of a keyboard for working with a modern digital computer dates to 1956.
In addition to many academic and research systems, there were several companies with commercial products in the 1980s: Pencept, Communications Intelligence Corporation, and Linus were among the best known of a crowded field. Later, GO Corp. brought out thePenPoint OS operating system for a tablet computer product: one of the patents from GO corporation was the subject of recent infringement lawsuit concerning the Tablet PC operating system.
With tablets being used for business communication purposes, it is now equally important as 1300 Numbers for companies.
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