Psion was a designer and manufacturer of mobile/handheld computers. Formed in 1980, its first successes were the revolutionary Psion Organiser and other Personal Digital Assistants. Psion also developed operating systems for its devices. Later Psion decided to close, or dispose of, its previous projects and focus on rugged mobile computing solutions.
Psion was one of the founders of Symbian Ltd. in 1998.
Sites in English only.
Notebook, handheld or wearable computing devices that are water-resistant or waterproof and capable of surviving drops of at least 48 in. (122cm) onto a hard surface.
Symbian Ltd. was a software development and licensing company. It was established in 1998 as a partnership between Ericsson, Nokia, Motorola, and Psion. It was acquired by Nokia in 2008.
Sites in English only.
For links relating to third generation networks and/or network technologies, not add-ons like ringtones or wallpapers.

To add a ringtone, wallpaper or cellular add-on website, please see: Computers/Mobile_Computing/Wireless_Data/Cellular_Add-ons/