Subsequent Hand-held Devices
The name "Organiser" was not used for later Psion handhelds, such as the "SIBO" family Psion Series 3 and the 32-bit Psion Series 5 machines which were of a clamshell design with a QWERTY keyboard. In terms of hardware architecture and operating system, these had no links to the earlier "Organiser" range, other than the end user programming language which shared a great deal of structure with OPL.
The "SIBO" family name stood for "SIxteen Bit Organiser" and the improved version of the OPL language (with window and focus controls) was at the root of what was later sold as the Symbian operating system, which until 2010 was the most widely used OS in smartphones, being in 2011 displaced by Google's Android OS. This change was more significant than appeared at the time. The consumer level 'high' programming language still shares features with OPL, but the developer toolkits were from then on focused on programmers familiar with C and only the Symbian operating system remains.
The first similar device made in the USA didn't appear until 1985 and was manufactured by Validec.
Read more about this topic: Psion Organiser
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