Acorn launched the Pocket Book in 1992. The Pocket Book is an OEM version of the Psion 3. The main difference was in the built-in applications and, of course, the Acorn logos. The Pocket Book was designed for use in schools and can be linked to Acorn, Mac or Windows computers with special links and software that automatically converts common file formats. The Pocket Book can run Psion Series 3 software so there is a wealth of applications available.