About the BAA

The BAA was founded 40 years ago to promote a family of interactive array-programming languages noted for elegance, conciseness and fast development speed. Many of them were derived from Kenneth Iverson’s mathematical notation.

As a group, we organise regular events around the UK and encourage participation from as many people as possible. The BAA London group meet once per month (in London) and all are welcome to come along and join in.

The BAA is administered by a committee of officers elected by ballot of Association members at the Annual General Meeting. Working groups are also established in areas such as activity planning and journal production. Offers of assistance and involvement with any Association matters are always welcomed.

Funding for the BAA comes entirely from the sustaining members. In many cases, these sustaining members also provide manpower and administrative assistance to the association at their own cost.

Paul Grosvenor


Paul started out as a keen engineer constantly tinkering with engines and motorcycles. At university he studied Mechanical Engineering and went on to work with British Aerospace on various fast jet projects but in particular the ‘man machine’ interface. He became interested in the use of computers in real world situations and was particularly successful in putting his engineering and interfacing experience to such use.

Some of Paul’s career highlights include the Carbon Fibre wing spar design for the Tornado jet, Fibre Optic message signs for UK motorway use and forecasting models for manufacturing processes.

John Jacob

Vector Working Group

Jake set out as a field biologist mostly collecting and identifying invertebrates in London parks and commons mostly accompanied by Bruno the whippet.

Following a career switch into IT, Jake then followed a path through Systems Analysis with British Aerospace and BUPA to a Consultant role in the hectic environment of FX trading floors of both UK and Swedish banks.

Thereafter followed a spell as a freelance Consultant in FX systems and web design.

Stephen Taylor

Vector Working Group

Stephen’s first APL project modelled logistics for the 1975 British Everest South-West Face Expedition, described in his appendix to Chris Bonington’s Everest the Hard Way.

He has lived and worked in Australia, Britain, Denmark, Korea, Switzerland and the United States. He now lives in London.

Phil Last


After a varied career from road sweeper to adventure playleader, milkman to teacher, Phil got into programming at the age of thirty.

Lucky enough to learn APL in his first job he has spent the past thirty-five years writing mainly utilities and the past nineteen writing almost exclusively in dfns with an increasing emphasis on tacit code.

He recently moved to Wessex after sixty-five years in London.