Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The Psion Organiser was the brand name of a range of pocket computer developed by the British company Psion (now Psion Teklogix) in the 1980s. The Organiser I (launched in 1984) and Organiser II (launched in 1986) had a characteristic hard plastic sliding cover protecting a 6x6 keyboard with letters arranged alphabetically. Early Psions are very robust (as witnessed by tech support people who were able to retrieve data from machines run over by cars and even forklift trucks) and they have been sold in very large numbers (about a million). Some continue to be used commercially, although the firmware of the two-line models fails to acknowledge dates after the end of 1999. However, there is a patch available. The Organiser had an independent user group (IPSO) for nine years, with a worldwide following, until the establishment of the Series 3 made it largely redundant.

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