Totally these PDAs have a little keyboard, which in all however a Organiser's out break is of the standard QWERTY layout, or regional variation thereof.

Psion was established around 1980, & in a period of the number 1 3 years developed games and utilities for the early home computers such as the Sinclair ZX Spectrum. Occasionally of the computer software was freed by Melbourne House. Its title is said to mean "Potter Scientific Instruments Or Nothing", the information to its founder Sir David Potter.

Psion developed its have operating patterns known as EPOC to start its PDA products. In a latter half of the Nineties Psion saw the likely for convergence between PDAs & cellular phone, which resulted in the eventual formation of Symbian Ltd. in June 1998 in conjunction with leading companies in the sector, notably Nokia, Ericsson and Motorola. Psion retained the 20-30% shareholding in the spun-out business. a EPOC operating rules became called a Symbian Operating Rules, which now powers a total of leading smartphones like the Sony Ericsson P900 series.

Psion withdrew from either either either a consumer devices business around 2002 in the face of decreasing margins & competition from keyboardless PDAs from corporations like Palm, largely retreating into the industrial free to wander information-entry devices sector across their buy of Teklogix (Canada).

Within 2004, Psion announced its intention to dispose of the company's remaining Symbian shareholding to Nokia, as it there are no elongated regarded it as a core a share of their strategy. Although opposing by numerous shareowner, a big shareholding of a founder, David Potter, ensured the vote was carried.

Getting closed or even discarded of everthing its former operations, Psion now is of a single left over in operation section, Psion Teklogix.