This volume contains the proceedings of the 21st International Conference on Application and Theory of Petri Nets. The aim of the Petri net conferences is to createaforumfordiscussingprogressintheapplicationandtheoryofPetrinets. Typically, the conferenceshave 100{150participants{ one third of these coming from industry while the rest are from universities and research institutions. The conferences always take place in the last week of June. The conference and a number of other activities are co-ordinated by a ste- ingcommittee withthe followingmembers: G.Balbo(Italy), J.Billlington(A- tralia), G.De Michelis(Italy), C.Girault(France), K.Jensen(Denmark), S.- magai (Japan), T. Murata (USA), C. A. Petri (Germany; honorary member), W. Reisig (Germany), G. Roucairol (France), G. Rozenberg (The Netherlands; chairman), and M. Silva (Spain). Otheractivitiesbeforeandduringthe2000conferenceincludedtoolpresen- tions and demonstrations, a meeting on \Interchange Formats," extensive int- ductorytutorials, twoadvancedtutorialson\HardwareDesign"and\Timedand Hybrid Automata," and two workshops on \Software Engineering" and \Pr- tical Use of High-Level Nets." The tutorial notes and workshop proceedings are not published in these proceedings, but copies are available from the organisers. The 2000 conference was organised by the CPN Group at the University of Aarhus, Denmark. We would like to thank the organisers (see next page) and their teams. WewouldliketothankverymuchallthosewhosubmittedpaperstothePetri net conference.We receiveda totalof 57submissions from 20di erent countries. This volume comprises the papers that were accepted for presentation. Invited lectures were given by Jordi Cortadella, Philippe Darondeau, Gregor Engels, Serge Haddad, Kim Guldstrand Larsen, and Ole Lehrmann Madsen.

This volume contains the proceedings of the First European Software Engineering Conference, held at Strasbourg on September 9-11, 1987. The purpose of ESEC 87 was to provide a European forum for the interchange of ideas, and presentations of the current state of research and development in software engineering. The conference had over 400 participants, and papers were presented from all over Europe, Japan and North America. The book brings together the latest information on software engineering. Not only are working systems described but the latest research topics are also covered. The book will be of interest to all computer professionals as a rapid means of obtaining the state-of-the-art in the subject. The content will be of interest to practitioners and researchers alike. The papers are grouped into topics for easy reference and the whole of software engineering is covered. In particular the book contains much information on the important new topics of support environments. The reader will not only gain a knowledge of the subject but will also find which organisations and institutes are working in particular areas. The reader will gain both industrial and academic perspectives on the subject.

Whilst the familiar themes of science and technology are examined with the snappily-smart observations he's known for, in this second collection Dan taps into a more personal and poignant voice. By turns robust and vulnerable, the book is shot through with the sense of humour and linguistic dexterity for which the former Canterbury Laureate has built a reputation in the world of spoken word. Unafraid to play with form and structure, the collection includes a univocalic black cab journey; a music review featuring all the words first coined in 1985; and a shape poem in the shape of a poem. Featuring pieces from four full-length solo shows, plus material written for residencies and commissions, Totally Cultured is poetry at its most engaging and contemporary.

Unlike many a debut poet, Dan has given this collection a thorough stress test on the live circuit, and many of these poems have been commissioned for public projects. Dan is a poet who likes to play around with form. He likes to deconstruct and get a bit meta with the mental algorithms that sit beneath a poem.The result is an accessible and enjoyable collection of poems for geeks, nerds, and anyone who likes playing with words.