Content for Psion Organizer II

Psion Organiser was the brand name of a range of pocket computers developed by the British company Psion in the 1980s. The Organiser I (launched in 1984) and Organiser II (launched in 1986) had a characteristic hard plastic sliding cover protecting a 6×6 keypad instead of a computer keyboard, with letters arranged alphabetically. In 1986, the successful Organiser II introduced many hardware improvements, a better keyboard and display, a much larger ROM and either 8 KB (CM Model), 16 or 32 KB (XP Model), 32 or 64 KB (later LZ Model) of battery-backed RAM, and featured a capable newly designed single-tasking operating system. The first Organiser II models featured a two-line display. The new model supported several different types of improved Datapaks, containing either EPROM or battery-backed RAM storage, each storing between 8 KB and 128 KB of data. Later electrically erasable programmable read-only memory (EEPROM) flashpaks, and random-access memory (RAM) RAMpaks, were added to the range, able to store up to 256 KB on each extension slot.