Tony Brooker Interviewed by Tom Lean
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Computer Conservation Society
Issue Number 52 Autumn 2010 Computer Conservation Society Aims and objectives The Computer Conservation Society (CCS) is a co-operative venture between the British Computer Society (BCS), the Science Museum of London and the Museum of Science and Industry (MOSI) in Manchester. The CCS was constituted in September 1989 as a Specialist Group of the British Computer Society. It is thus covered by the Royal Charter and charitable status of the BCS. The aims of the CCS are: To promote the conservation of historic computers and to identify existing computers which may need to be archived in the future, To develop awareness of the importance of historic computers, To develop expertise in the conservation and restoration of historic computers, To represent the interests of Computer Conservation Society members with other bodies, To promote the study of historic computers, their use and the history of the computer industry, To publish information of relevance to these objectives for the information of Computer Conservation Society members and the wider public. Membership is open to anyone interested in computer conservation and the history of computing. The CCS is funded and supported by voluntary subscriptions from members, a grant from the BCS, fees from corporate membership, donations, and by the free use of the facilities of both museums. Some charges may be made for publications and attendance at seminars and conferences. There are a number of active Projects on specific computer restorations and early computer technologies and software. -
Computer Conservation Society
Issue Number 88 Winter 2019/20 Computer Conservation Society Aims and Objectives The Computer Conservation Society (CCS) is a co-operative venture between BCS, The Chartered Institute for IT; the Science Museum of London; and the Science and Industry Museum (SIM) in Manchester. The CCS was constituted in September 1989 as a Specialist Group of the British Computer Society. It is thus covered by the Royal Charter and charitable status of BCS. The objects of the Computer Conservation Society (“Society”) are: To promote the conservation, restoration and reconstruction of historic computing systems and to identify existing computing systems which may need to be archived in the future; To develop awareness of the importance of historic computing systems; To develop expertise in the conservation, restoration and reconstruction of historic computing systems; To represent the interests of the Society with other bodies; To promote the study of historic computing systems, their use and the history of the computer industry; To publish information of relevance to these objectives for the information of Society members and the wider public. Membership is open to anyone interested in computer conservation and the history of computing. The CCS is funded and supported by a grant from BCS and from donations. There are a number of active projects on specific computer restorations and early computer technologies and software. Younger people are especially encouraged to take part in order to achieve skills transfer. The CCS also enjoys a close relationship with the National Museum of Computing. Resurrection The Journal of the Computer Conservation Society ISSN 0958-7403 Number 88 Winter 2019/20 Contents Society Activity 2 News Round-Up 9 The Data Curator 10 Paul Cockshott From Tea Shops to Computer Company: The Improbable 15 Story of LEO John Aeberhard Book Review: Early Computing in Britain Ferranti Ltd. -
Bedside 11 12 03.Indd
Wandsworth SocietetyÈ ˘ ˘˘ ˘˘˘ ˘˘˘˘ ˘˘˘˘˘ ˘˘˘˘˘˘ ˘˘˘˘˘˘˘ ˘˘˘˘˘˘˘˘ ˘˘˘˘˘˘˘˘˘ ˘˘˘˘˘˘˘˘˘˘ The Bedside 1971 - FORTY YEARS ON - 2011 Mistletoe istletoe, forming as numerous illustrations show, it was remembered that a vile- evergreen clumps on the association of kissing and tasting tea, made from mistletoe apple and many other mistletoe was well established by which grew on hawthorn, was broad-leaved trees, Victorian times. used to treat measles. Other is a strange plant. It people have collected informa- Mabsorbs water and nutrients from tion on mistletoe being used to its host trees, but as it has chlo- treat hysteria in Herefordshire and rophyll it is able to make its own prevent strokes in Essex. food. If sufficiently mature seeds are Pliny the Elder in the first century used mistletoe can be easily A.D. described Druids in France grown on apple trees. Seeds cutting mistletoe from oak trees extracted from Christmas mistle- in a ritual which involved golden toe are not mature, so it’s neces- sickles, dressing in white cloaks, sary to collect berries in April, slaughtering white bulls. Because squeeze out the seeds and insert of this, mistletoe was considered them in a notch cut in the tree’s to be a pagan plant and banned bark. After a couple of months from churches. small plants emerge, but many of these seem to die within a Mistletoe was associated with year. Survivors grow rapidly and Christmas since the mid-17th live for many years. However, century. By the 19th century this mistletoe produces female and association was well established, male flowers on different plants, and people who had mistletoe- and although I’ve left a trail of bearing trees on their land were mistletoe plants behind me as I’ve bothered by people who raided The situation is complicated by moved around, I haven’t yet man- them. -
Short Bios of Attendees Peter Mcburney Is a David Hales Is a Senior Professor of Computer Research Fellow at the Science and Head of the Open University
Short Bios of Attendees Peter McBurney is a David Hales is a senior Professor of Computer research fellow at The Science and Head of the Open University. I do Department of Informatics at research at the overlap King's College London. He is a member of the Agents and between computer Intelligent Systems (AIS) science and social Group of the Department. McBurney's research science. I am interested in focuses on several areas in multi-agent software open distributed systems that include both machine and human agencies where the systems including: agent communications imposition of central control is not an option and languages (ACLs) and protocols; multi-agent one can't rely on the "invisible hands" of simulation models of public policy and corporate orthodox economic (or game) theory. strategy domains; the presence of reflective intelligent entities able to learn, and able Jeffrey Johnson is Professor of themselves to model the environment they are Complexity Science and Design. in; cyber conflict, cyberwar and cyberweapons. I joined the Open University in Seth Bullock is Professor in 1980 after three years as Senior the Agents, Interaction and Research Associate in the Complexity Group and the Geography Department of Cambridge University, and six Institute for Complex Systems years as Research Fellow in the Mathematics Simulation at the University of Department of Essex University. Southampton. My principal research interest is evolutionary simulation modelling: the Jeremy Pitt is Reader in, and, application of evolutionary modelling techniques deputy head of the Intelligent developed within artificial intelligence (e.g., Systems and Networks Group at genetic algorithms) to problems within evolutionary biology (e.g., the evolution of Imperial College. -
Alan Turingturing –– Computercomputer Designerdesigner
AlanAlan TuringTuring –– ComputerComputer DesignerDesigner Brian E. Carpenter with input from Robert W. Doran The University of Auckland May 2012 Turing, the theoretician ● Turing is widely regarded as a pure mathematician. After all, he was a B-star Wrangler (in the same year as Maurice Wilkes) ● “It is possible to invent a single machine which can be used to compute any computable sequence. If this machine U is supplied with the tape on the beginning of which is written the string of quintuples separated by semicolons of some computing machine M, then U will compute the same sequence as M.” (1937) ● So how was he able to write Proposals for development in the Mathematics Division of an Automatic Computing Engine (ACE) by the end of 1945? 2 Let’s read that carefully ● “It is possible to inventinvent a single machinemachine which can be used to compute any computable sequence. If this machinemachine U is supplied with the tapetape on the beginning of which is writtenwritten the string of quintuples separated by semicolons of some computing machinemachine M, then U will compute the same sequence as M.” ● The founding statement of computability theory was written in entirely physical terms. 3 What would it take? ● A tape on which you can write, read and erase symbols. ● Poulsen demonstrated magnetic wire recording in 1898. ● A way of storing symbols and performing simple logic. ● Eccles & Jordan patented the multivibrator trigger circuit (flip- flop) in 1919. ● Rossi invented the coincidence circuit (AND gate) in 1930. ● Building U in 1937 would have been only slightly more bizarre than building a differential analyser with Meccano. -
Bat-Bec Bat-Bec
• 322 BAT-BEC LONDON COUNTY SUBURBS BAT-BEC • Batten GeorgeBeckettM.D.phys.&surg. 2 Underhill rd.E.Dulwich SE Baumann John, baker, 75 Elthorne road, Hornsl"y RiseN Beau John, confectioner, 133 Canterbury road, Kilbum NW -'1' N 738 Sydenham & see Batten, Stew art & Oarpmael BanmberEmma(Mrs.),plumber,4 Gains borough rd. Hckny. WickNE Bean Louis, tailor, 61 St. Jame>' place, Plumstead SE Batten John, milliner, 142 Trafalgar rond, Greenwich SE Bauml Richard, apartments, 4 Parliament hill, Hampstead NW Bean Louis Constantine, phys. & surg.l8 & 4S Falcon rd. Bttersea SW Batten Richard, butcher, 98 Mitcham lane, Btreatham SW Bause Ernest William, confectioner, 349 Brockley rd. Brock.ley SE !3":J.·o l'loo '''"· hn•l·ler, 110 .Bicker~teth road, Tooting- SW Batten Thowas, ticket writer. 42 Bel1enden road, Peckham SE Baverstock Louis, printer, see Parsons & Baverstock Rcaue Genrge, insnmnce agent, 147 Mildenha.ll rd. Low.Cbpton NB Batten William B. patent medicine proprietor, 431 Brixton road SW Bawden Frederick, grocer, 19IA & l!HB, Munster road,Fulham SW 13eanes E. & Co. Ltd. Falcon chemical works, 82 Wallia road, Batterhury Thomas, district surveyor, 15 Griffin road, Plumstead BE BaxWilliam Jn. & Son, timber mers. 56 Priory grove, S.La.mbeth SW Hacknev Wick NE-T N 671 East Batterham Alfred Jas. drug stores, 16 Fonthill rd. Finsbury Park N Bax Kate (Mill.), dressmaker, 33 L<m•anne road. Peckham SE Beaney Fredk.wood turner,48A.Rye la.Pckhm SE -TN 414New0ross Battersea Borough Council (Wm. Ma.rcus Wilkins, town clerk ; Ba.xter & Sons, newsagents, 47 Artillery place, Woolwicb SE BP.ru1ey Frederick Charles, wood turner, 20 Elm J.,'l'O. -
ATLAS@50 Then and Now
ATLAS@50 Then and now Science & Technology Facilities Council The origins of Atlas In the years following the Second World War, there was huge interest in nuclear physics technologies both for civilian nuclear energy research and for military nuclear weapons. These technologies required ever-increasing amounts of computer power to analyse data and, more importantly, to perform simulations far more safely than would be possible in a laboratory. By 1958, 75% of Britain’s R&D computer power was provided by the Atomic Energy Authority (UKAEA) at Aldermaston (using an American IBM 704), Risley, Winfrith and Harwell (each using a British Ferranti Mercury). These were however what we would now call The advisory panel for the super-computer single-user systems, capable of running only included Freddy Williams (a pioneer in radar and Foreword one program at a time, so were essentially very computer technology) from Victoria University large desktop calculators. Indeed, the name of Manchester, Maurice Wilkes (designer of It is now known as Rutherford Appleton Laboratory buildings R26 and R27, but over “computer” referred to the human operator; EDSAC, the Electronic Delay Storage Automatic its 50+ year history, the Atlas Computer Laboratory in the parish of Chilton has been the machinery itself was known as an Calculator) from Cambridge, Albert Uttley of the “automatic calculating machine.” RRE (Royal Radar Establishment), and Ted Cooke- part of many seminal moments in computing history. Yarborough (designer of the Dekatron and CADET British manufacturers of automatic calculating computers) from AERE Harwell; Christopher Over its 50+ year history it has also housed It was cleaned and restored as far as we could, machines were doing well until IBM announced Strachey (a pioneer in programming language many mainframe and super-computers including and took pride of place at an event held to that their first transistorised computer was to design) was in charge of design. -
Historical Group NEWSLETTER and SUMMARY of PAPERS
Historical Group NEWSLETTER and SUMMARY OF PAPERS No. 76 Summer 2019 Registered Charity No. 207890 COMMITTEE Chairman: Dr Peter J T Morris Dr Christopher J Cooksey (Watford, 5 Helford Way, Upminster, Essex RM14 1RJ Hertfordshire) [e-mail: [email protected]] Prof Alan T Dronsfield (Swanwick) Secretary: Prof. John W Nicholson Dr John A Hudson (Cockermouth) 52 Buckingham Road, Hampton, Middlesex, Prof Frank James (Royal Institution) TW12 3JG [e-mail: [email protected]] Dr Michael Jewess (Harwell, Oxon) Membership Prof Bill P Griffith Dr Fred Parrett (Bromley, London) Secretary: Department of Chemistry, Imperial College, Prof Henry Rzepa (Imperial College) London, SW7 2AZ [e-mail: [email protected]] Treasurer: Prof Richard Buscall Exeter, Devon [e-mail: [email protected]] Newsletter Dr Anna Simmons Editor Epsom Lodge, La Grande Route de St Jean, St John, Jersey, JE3 4FL [e-mail: [email protected]] Newsletter Dr Gerry P Moss Production: School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, London E1 4NS [e-mail: [email protected]] https://www.qmul.ac.uk/sbcs/rschg/ http://www.rsc.org/historical/ 1 Contents From the Editor (Anna Simmons) 2 RSC HISTORICAL GROUP JOINT AUTUMN MEETING 3 William Crookes (1832-1919) 3 RSC HISTORICAL GROUP NEWS 4 Secretary’s Report for 2018 (John Nicholson) 4 MEMBERS’ PUBLICATIONS 4 PUBLICATIONS OF INTEREST 4 NEWS FROM CATALYST (Alan Dronsfield) 5 FORTHCOMING EXHIBITIONS 6 SOCIETY NEWS 6 OTHER NEWS 6 SHORT ESSAYS 7 How Group VIII Elements Posed a Problem for Mendeleev (Bill Griffith) 7 Norium, Mnemonics and Mackay (William. -
Curriculum Vitae (PDF)
CURRICULUM VITAE JOHNSTON, RONALD JOHN Date of Birth: 30 March 1941 ACADEMIC CAREER 1959-1964 School of Geography, University of Manchester: Wiltshire County Scholarship 1959-1962 B.A. Honours, Class II.I June 1962 State Studentship in Arts 1962-1963 MA June 1964. 1964-1966 Department of Geography, Monash University 1964 Teaching Fellow 1965 Senior Teaching Fellow 1966 Lecturer 1967 PhD 1967-1974 Department of Geography, University of Canterbury 1967-1968 Lecturer 1969-1972 Senior Lecturer 1973-1974 Reader 1974-1992 Department of Geography, University of Sheffield 1974- Professor 1982-5 Head of Department. 1989-1992 Pro-Vice-Chancellor for Academic Affairs, University of Sheffield. 1992-1995 Vice-Chancellor, University of Essex 1995- Professor of Geography, University of Bristol 1999- Adjunct Professor, Department of Human Geography, Macquarie University 2003- Member, Centre for Market and Public Organisation, Department of Economics, University of Bristol AWARDS 1969 Erskine Fellow, University of Canterbury. Fellowship awarded to enable attendance at international conferences in U.S.A. and U.K. and to undertake research in Venezuela, Colombia, Ecuador and Peru. 1972 Visiting Associate Professor, Department of Geography, University of Toronto. 1973 Academic Visitor, Department of Geography, London School of Economics and Political Science. 1973 British Council Commonwealth Academic Interchange Scheme, Travel Fellowship. 1976 Official Overseas Guest, South African Geographical Society Quadrennial Conference, University of Orange Free State, Bloemfontein and Visiting Professor, Department of Geography and Environmental Studies, University of the Witwatersrand, Johannesburg. 1985 Official Conference Guest, Conference of Irish Geographers, Carysfort College, Blackrock, February 1985. 1985 Recipient of the Murchison Award of the Royal Geographical Society, London, for contributions to political geography. -
Compiler Construction
Compiler construction PDF generated using the open source mwlib toolkit. See http://code.pediapress.com/ for more information. PDF generated at: Sat, 10 Dec 2011 02:23:02 UTC Contents Articles Introduction 1 Compiler construction 1 Compiler 2 Interpreter 10 History of compiler writing 14 Lexical analysis 22 Lexical analysis 22 Regular expression 26 Regular expression examples 37 Finite-state machine 41 Preprocessor 51 Syntactic analysis 54 Parsing 54 Lookahead 58 Symbol table 61 Abstract syntax 63 Abstract syntax tree 64 Context-free grammar 65 Terminal and nonterminal symbols 77 Left recursion 79 Backus–Naur Form 83 Extended Backus–Naur Form 86 TBNF 91 Top-down parsing 91 Recursive descent parser 93 Tail recursive parser 98 Parsing expression grammar 100 LL parser 106 LR parser 114 Parsing table 123 Simple LR parser 125 Canonical LR parser 127 GLR parser 129 LALR parser 130 Recursive ascent parser 133 Parser combinator 140 Bottom-up parsing 143 Chomsky normal form 148 CYK algorithm 150 Simple precedence grammar 153 Simple precedence parser 154 Operator-precedence grammar 156 Operator-precedence parser 159 Shunting-yard algorithm 163 Chart parser 173 Earley parser 174 The lexer hack 178 Scannerless parsing 180 Semantic analysis 182 Attribute grammar 182 L-attributed grammar 184 LR-attributed grammar 185 S-attributed grammar 185 ECLR-attributed grammar 186 Intermediate language 186 Control flow graph 188 Basic block 190 Call graph 192 Data-flow analysis 195 Use-define chain 201 Live variable analysis 204 Reaching definition 206 Three address -
No 356, April 2013
The Clapham Society Newsletter Issue 356 April 2013 Our regular monthly meetings are held at Clapham Manor Primary Clapham Pottery School, Belmont Road, SW4 0BZ. The Who was Montague Weldon Champney? In 1922 Sir Francis and Lady Champney built entrance to the school in Stonhouse a little chapel in Clapham, in memory of their son who had died 28 years earlier, as Street, through the new building, is recorded on a plaque in the chapel. The delightful building was attached to a home for NOT open for our evening meetings. orphaned and vulnerable boys of the parish from the end of the First World War until the Use the Belmont Road entrance, cross late 1970s. Then, for 30 years, it served as a training centre for an educational charity and the playground and enter the building is currently the home of Clapham Pottery, operating on a lease from Lambeth Council. on the right. The hall is open from 7.30 The charity runs classes for all ages and skills, providing free courses for the pm when coffee and tea are normally homeless, vulnerable children and the elderly from fees paid by those in work and other available. The talk begins promptly events such as team building programmes, children’s parties, and fund raising activities. at 8 pm and most meetings finish by This may all be jeopardised because Lambeth is in the process of selling off all their 9.30 pm. Meetings are free and non- properties to raise funds to reduce the impact of the loss of central government funding. -
1949 Concordia Vol III No 10 October
·"Concordia"' The OffiCial Organ of The Clapham Old Xaverians'· . Association _ Vol. III OCTOBER, 1949 No. 10 FOREWORD This year the Qld Boys' Association comes of age. and · Concordia, its mouthpiece, begins its 21st year with the -present number. Having assisted ·at the birth of the two sturdy babes, now grown to. manhood, I feel a very sincere· pleasure and a certain almost proprietary interest in offering my congratulations. May both the Association and the magazin_e continue to until they attain at least that desirable age at which a l_?enevolent · State restores in· \yeekly doles some of whaf it: has long and· prudently .extracted from a carefree democracy. · - , The foundation and prosperity of any are due in general to the_ efforts of a devoted few. We have been happy . in that the Association arid ·concordia have never lacked patient 'and capa}?le helpers who have believed in their wo.rk. \ :I stress . the long-suffering pertinacjty of our officials, because they have persevere9 ·through the war and its sequel. (for- whiGh I have no adequate ·name), through periods of effervescence and ditchwater . flatness, unruffled and confident. · (Any gentleman familiar with 'the behaviour. of -modeD;l bottled beer . will see the appositeness of .the. above.) · · · .. Old boys and go; some fall by the wayside, others among thorns--which lapse, I suppose, here indicates matrimony -but the :nucleus remains, and to ·everyone who has worked for us ·during these years, :whether as secretary, treasurer, editor, committee-man, sports or entertainment organiser, or as . that humble, invaluable unit, the member who has taken an ' interest and paid ·his sub., we are deeply gratefuL If I do hof mention names; it is because I· am loth to omit.