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Lernstift digital pen notifies the user about all cases of misspellings. The pen works on the basis
of Linux. Special sensors track the movement and allow to detect errors, and in case of their detection comes vibrating signal. Lernstift works in two modes: Calligraphy Mode and Orthography Mode. In the mode of calligraphy pen notifies the error in calligraphy, and in the orthography mode identifies spelling and grammar errors. There are two varieties of digital pen. So, the first generation of devices should appear in the middle of 2013. It will be handle with motion sensors and the system, to identify the words. And the second generation will appear no earlier than in 2014, here, in addition to these components, will be a special pressure sensor. This function will help the children to properly hold a pen and press on it. In the case of strong pressing the knob begins to vibrate.