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.
Murata Manufacturing Co Ltd developed a motion sensor that enables to operate a device just by moving a finger without touching it.