Editing Psion (company) (section)

===EPOC (1987)===
{{Main|EPOC (operating system)}}
[[File:Psion 3 17o06.jpg|thumb|Psion Series 3]]
In 1987, Psion began developing its ''SIxteen Bit Organiser'' (SIBO) family of devices and its own new multitasking operating system named [[EPOC (operating system)|EPOC]], to run its third generation product, Laptops (MC), industrial handhelds (HC and Workabout) and PDA (Series 3) products.<ref name=history/>

It is often rumoured that EPOC stands for "Electronic Piece Of Cheese" however Colly Myers, who was Symbian's CEO from founding until 2002,<ref>{{cite news
| last= Frankal
| first= Elliot
| date= 2005-09-04
| title= Ask and it shall be texted to you
| url =https://www.theguardian.com/business/2005/sep/04/theobserver.observerbusiness8
| work = The Observer
| access-date = 2008-12-27
}}
</ref> said in an interview that it stood for 'epoch' and nothing more. This development effort produced the clamshell QWERTY-based [[Psion Series 3]] palmtops (1993–98), which sold in the hundreds of thousands, and the Psion MC-series laptops, which sold poorly compared to the DOS-based laptops of the era.

[[File:2005-04-16 Psion Serie 5mx PRO 24MB beschn unscharf scharf.JPG|thumb|Psion 5mx Pro]]
A second effort, dubbed Project Protea, produced the Psion [[Psion 5|Series 5]] for sale in 1997, a completely new product from the 32-bit hardware upwards through the OS, UI, and applications.<ref name=history/> It is still remembered for its high quality keyboard which, despite its size, allowed for touch-typing. However, the new feel of the product, and the removal of certain familiar quirks, alienated loyal Series 3 users, who tended to stick with their PDAs rather than upgrade.

In 1999, Psion released the [[Psion Series 7]], which was much like a larger version of the Series 5, but with a double-size VGA-resolution screen that featured 256 colours (the Series 5 had a half-VGA screen with 16 grey shades). It was followed by the very similar [[Psion netBook]].

Psion was being challenged by the arrival of cheaper PDAs such as the [[Palm Pilot]], and PocketPCs running Microsoft's [[Windows CE]], and in 2003, Psion released a Netbook Pro running Windows CE .NET 4.2 instead of EPOC.