The Sequal News: Jim’s New Voice, 2016, No.260119.

The Sequal Trust started out as the POSSUM users' association in the 1960s. POSSUM stood for Patient Operated Selector Mechanism and was the first specialist equipment developed for the use of the disabled community.

Stephen Hawking's early generation communications systems included such equipment, and he became a patron of this trust as early as 1992.

More on the history of this association is found here: https://www.thesequaltrust.org.uk/history

Most of the journals and magazines in Stephen Hawking's office were transient items, which would have entered upon publication, and gradually circulated out in a relatively short time frame. The vast majority of such items in the office date from the last years of Stephen's life, from 2015 onwards, and haphazardly reflect on subscriptions, affiliations and societies where he happened to be most active at that moment in time.