Old-Computers.com : Acorn - Pictures, specifications and some background information on all models made by Acorn. - http://www.old-computers.com/museum/company.asp?st=1&m=3
The Acorn Atom pre-history - Details and photographs of the industrial and educational systems Acorn produced, before turning to the consumer-orientated market. - http://www.xs4all.nl/~fjkraan/comp/atom/history/index.html
About Acorn Computers and ARM Processors - Includes an introduction, history, hardware and software details, photographs, and screenshots of the RISC OS operating system. - http://atterer.net/acorn.html
A Technical History of Acorn Computers - A list of significant events and releases in the history of Acorn, with details of each. - http://www.mcmordie.co.uk/acornhistory/acornhistory.shtml
ARM Assembler Programming - Guide to programming in assembler, along with information about what one needs to get started, examples, and opinions. - http://www.heyrick.co.uk/assembler/
From Atom to Arc - Details the history of Acorn Computers, with photographs. - http://www.stairwaytohell.com/articles/AU-AcornHistory.html