Digitalizers or graphics tables enable the registering of the writing process executed with a special stylus. The protocol includes measurements of pressure and speed. It also registers the movement direction on the surface of the tablet as well as in the air. The most popular digitalizers are those by Watcom. A special computer program evaluates the protocol. The quality of the analysis is mostly defined by the quality of the evaluating software.
CSWin (Science And Motion, Germany)
MovAlyzeR (NeuroScript, USA)
ComPET (Technion, Haifa, Israel)