DERA - as was. Now under a different name. This is the Defence Research Establishment based in Portsmouth.

SIEMENS - specifically the machine tools division who use 2.5in disks for control data.

Norfolk Fire Service - who use 2.5in disks in the cab for GPS mapping, building plans, and environment information.

Cummins Diesel - used both in office and engine test environments.

TNT Post - used to clone laptop drives and do off site back-up.

Henry Boot - used in offices.

Amdahl USA - used in offices and off-site back-up.