Acorn Online Media Set Top Box
The Acorn Online Media Set Top Box was produced by the Online Media division of Acorn Computers Ltd for the Cambridge Cable and Online Media Video on Demand trial and launched early 1996. Part of this trial involved a home-shopping system in partnership with Parcelforce.
- Memory: 4 MiB RAM
- Processor: ARM 610 processor at 33 MHz; approx 28.7 MIPS
- Operating system: RISC OS 3.50 held in 4 MiB ROM
The STB20 was a new PCB based around the ARM7500 System On Chip.
- Processor: ARM7500 processor
- Operating system: RISC OS 3.61, a version specific for this STB, held in 4 MiB ROM.
By this time Online Media had been restructured back into Acorn Computers, so the STB22 is branded as 'Acorn'. 
- Operating system: a development of RISC OS held in 4 MiB ROM
- Darlington, Roger (18 October 2001). "Parcelforce : Profile". CWU Research, RD96/140/6. CWU. Retrieved 21 January 2014.
- "Acorn World show". Acorn User. September 1995. Retrieved 21 January 2014.
- Chris, Whytehead. "Chris's Acorns: Online Media STB1".
- Stephen Bo Furber (2000). ARM System-on-chip Architecture. Addison-Wesley. p. 361. ISBN 978-0-201-67519-1. (ARM System–on–Chip Architecture)
- "Acorn launches new set-top box". telecompaper. 19 March 1997. Retrieved 21 January 2014.
- Chris, Whytehead. "Chris's Acorns: Acorn NCs, STBs & Prototypes".