RISC OS User Group Of London
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Welcome to RISC OS User Group Of London |
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ABOUT ROUGOL
ROUGOL is a not-for-profit organisation consisting of Acorn/RISC OS computer users in London and the south-east. Our aim is to bring those users together. There is no membership fee and entry to all meetings is free. To find out more, email us.
MEETINGS
Meetings are held on the third Monday of every month. Most meetings feature a guest speaker, demonstrating the latest hardware or software, giving tutorials of software both new and old, or simply to kick off discussions on the current hot topic. Entrance is free, so why not come along and say hello?
Next meeting -
Monday 18th May 2026 
ARX and the Acorn Palo Alto Research Centre - Jim Mitchell
For our May meeting Acorn alumni Jim Mitchell will be Zooming in from his home in California. Jim managed the ARM development team and was head of the Acorn Research Centre in Palo Alto. This was where ARX, the originally planned multitasking, multithreaded, multiuser operating system for the Archimedes was being developed.
Very little has ever been heard about what happened there and how far ARX was developed, so this is a unique chance to find out all about it from the person in charge. We are also hoping to be joined by several other members of the development team to help answer questions.
While Jim will mainly be talking about his time at Acorn, before that he worked for 12 years at the legendary Xerox PARC where ethernet, laser printers, file sharing, the WIMP paradigm, and many more computing concepts we now take for granted were first developed. Later he worked for Sun and was responsible for the development of Java. Read his biography on Wikipedia.
He has had an amazing career and we are very excited to have him joining us :-)
Click here for more details
Future Meetings 
18 May: ARX and the Acorn Palo Alto Research Centre, Jim Mitchell
15 Jun: TBC
20 Jul: TBC
If there is a topic you would like to see covered at a future meeting, or (even better!) if there is a
subject you would like to talk about, please contact us.
London Show
The next RISC OS London Show will take place on Saturday 24th October 2026.
Recent Meetings
April: Desktop Themes, Paolo Zaino
March: JSbeeb and Compiler Explorer, Matt Godbolt
February: Retro YouTube and pocket computers, Colin Hoad
January: Multi headed systems, Chris Hall
December: Acorn Biography, Rob Napier
November: RISC OS Pyromaniac: Evolution, Gerph
October: RISCOSbits pre-show teaser, Andy Marks
September: Book Publishing with Ovation Pro, Gavin Crawford
August: Networking Elite, Mark Moxon
July: New 5tuff, Andrew Rawnsley, R-Comp
June: Everything I did at Acorn, Hugo Tyson
Click here for a full index of past meetings, reports etc...
If you see a topic that hasn't been covered for a while that you think
needs revisiting, please let us know.