Abacus Construction Index UK


Extonet Ltd: Publisher of Directory Websites

Extonet Ltd, based in Cambridge UK, specialises in publishing directory websites, designed to bring together in one place the best web resources within particular subject areas. It was founded in 2000 by Alex Reid, on his retirement as Director General at the Royal Institute of British Architects, London.

Extonet's Mission

There is a great deal of useful information on the world wide web, but it can be very difficult to find. The best information may be deeply buried within individual websites, and powerful search engines such as Google are so powerful that they are liable to swamp the user with irrelevant material.

Extonet's mission is to overcome this problem by selecting the best and most relevant web resources in a particular subject area, and then indexing these so that they can be found easily - either by using worldwide search engines to find an Extonet page, or by searching within an individual Extonet website.

Extonet's Websites

Extonet publishes four websites:

Abacus Construction Index USA at www.construction-index.com. A descriptive directory of recommended websites for architecture and construction in the USA.

Archinet UK at www.archinet.co.uk. A web resource on UK architecture and construction. Includes the British Architecture Page, Award Winners, Abacus Construction Index UK, Doors Resource, and Useful Links. 

Beesker at www.beesker.com. A descriptive directory of the world's best website on each of numerous specific subjects.

Britain's Best Architects at www.bestarchitects.co.uk. A guide to compiling short lists of outstanding architects for UK construction projects.

Extonet's websites are financed only by Google advertising, which is clearly identified; no payment is received from websites which are included in the directories.

Extonet Ltd

Extonet Ltd, the owner of the Extonet websites, is a limited company, registered in the UK. Its Company Registration Number is 2551298.

Address: 27 Millington Road, Cambridge CB3 9HW. Telephone: +44(0)1223 319733.

Email: aalreid followed by @ followed by gmail.com (please excuse this method of presentation, which is intended to avoid spam).

Banking details: Extonet Ltd, Bank of Scotland, 600 Gorgie Road, Edinburgh EH11 3XP.


The Managing Director of Extonet is Dr.Alex Reid. Alex Reid's original training was in architecture at Trinity College, Cambridge; his PhD, at University College London, was based on research into the future impact of telecommunications on transport and urban design.

From 1969 to 1972 he was Director of the Communications Studies Group at University College London. In 1972 he joined British Telecommunications (BT) as Head of Long Range Studies. At BT he was subsequently Director of Prestel and Chief Executive of Value Added Services.

From 1983 to 1990 he was Chairman of venture capital firm Octagon Investment Management, during which time he was non-executive Chairman of the Royal College of Art. From 1990 to 1993 he was Chief Executive of the international architectural practice DEGW. From 1994 to 2000 he was Director General at the Royal Institute of British Architects, where he oversaw the establishment of Architecture.com, the RIBA's world-leading architecture website.

Alex Reid founded Extonet in 2000, and is the senior editor of the Extonet websites. From 2003 to 2009 he was a Liberal Democrat member of Cambridgeshire County Council. He has been a consultant to Cambridge University on a new building project - the Hauser Forum on the West Cambridge site - and is a non-executive director of MJP Architects.

Sian Reid is a Director of Extonet Ltd. A languages graduate of Bristol University, she took an MBA at the London Business School.

She was with British Telecom from 1982 to 1990, as General Manager of several start-up value added services, and then as a Business Development Manager in the Mergers and Acquisitions Unit. From 1990 to 1995 she was Joint Managing Director of Legion, a telecomms company offering telephone information services through telecomms companies and broadcasters throughout Europe.

Sian Reid is a part-time Associate Lecturer in management studies at the Open University Business School, and is a Liberal Democrat member of Cambridge City Council


Publisher: Abacus Construction Index is a professionally edited directory of recommended construction websites. It is part of the Archinet UK website, published by Extonet Ltd. It is financed only by Google advertising; no payment is received from included websites.


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