Artifact Details


Riddiford, Martin interview and show and tell with Jim Fullalove

Catalog Number





In this interview designer Martin Riddiford, aided by CEO Jim Fullalove, discusses the groundbreaking work he did for Psion through his design company Therefore, based in London. Psion was a major pioneering handheld computer company, and Riddiford designed essentially all of their main models over a number of decades. Riddiford begins his oral history with a brief description of his background, education and what initiated his interest in design. His first job, after attending the Central School of Art Design, was as a model maker with a consulting firm called Fraser’s. Soon, the small consulting firm was contacted by Psion to design the Organiser I and II. This was very successful and Riddiford describes forming his own company, Therefore, rather than joining Psion. Therefore acted as the chief designer for Psion for a number of decades, collaborating on many projects including the Series 3, 5, and 7, the Psion netBook, and Revo. Riddiford recounts the design processes for these products and more, and the innovations that made them remarkable. Riddiford and Fullalove include a brief tour of their workshop, as well as a show and tell of their many models and projects in this interview.


2009-01-21; 2009-01-22


Fullalove, Jim, Interviewee
Nelson, Lauren, Editor
Riddiford, Martin, Interviewee
Weber, Marc, Interviewer; Videographer


Computer History Museum

Place of Publication

Therefore Product Design Consultants, 2 Scala Street, London, W1T 2HN United Kingdom


66 p.



Copyright Holder

Computer History Museum




Riddiford, Martin; Psion; Therefore; Sharp; Organiser I; Organiser II; Industrial Design; Palm Computing; Psion Series 3; Psion Series 5; Psion Series 7 Subnotebook; Psion Revo; TomTom GO; TomTom; Siemens

Collection Title

Oral history collection

Lot Number