Stochastic Petri nets: An elementary introduction -- Improving the efficiency of the analysis of DSPN models -- Synchronized elementary net systems -- Descriptive and analytical process algebras -- P/T-systems as abstractions of C/E-systems -- The semantics of capacities in P/T nets -- Petri net tool overview 1989 -- Equivalence transformations of PrT-Nets -- A reduction theory for coloured nets -- Optimizing microprograms for recurrent loops on pipelined architectures using timed Petri nets -- S-CORT®: A method for the development of electronic payment systems -- Timed Petri nets and application to multi-stage production systems -- Petri net systems and their closure properties -- Occam and the transputer -- About the concurrent behaviour of EN systems: Definability and closure results -- Petri nets and flexible manufacturing -- Some properties of timed nets under the earliest firing rule -- A comparative study of different techniques for semi-flows computation in place/transition nets -- Elementary net systems and dynamic logic -- Representation of a swapping class by one net -- Design methods based on nets -- CEDISYS compositional distributed systems state of the art, research goals, references.