1 Continuous Models -- 1.1 Host Parasite Model I -- 1.2 Host Parasite Model II -- 1.3 The Input of User Variables -- 1.4 Host Parasite Model III -- 1.5 The Host Parasite Model IV -- 2 Queued Systems -- 2.1 Brewery Model I -- 2.2 Running of the Model -- 2.3 Brewery Model II -- 2.4 Brewery Model III -- 3 The Facilities -- 3.1 Model of a Squirrel -- 3.2 The Model of a Repair Workshop -- 3.3 Job Processing Model -- 3.4 Group Practice Model -- 4 Pools and Storages -- 4.1 Computer Model I -- 4.2 Computer Model II -- 5 The Coordination of Transactions -- 5.1 Model of Parcel Transport -- 5.2 Model of a Scenic Mountain -- 5.3 The Coordination of Simultaneous Activities -- 6 Tanker Fleet Model -- 6.1 Description of the Tanker Fleet Model -- 6.2 The Structure of the Model -- 7 The Set Concept in GPS S-FORTRAN Version 3 -- 7.1 Host Parasite Model V -- 7.2 Structure of the Model -- 7.3 The Results -- 7.4 Problems -- 8 Specializations -- 8.1 Variables and Their Graphical Representation -- 8.2 Combination of Model Components to Structure -- 8. 3 The Representation of System Dynamics Models in GPSS-FORTRAN Version 3 -- 8.4 Differential Equations of Higher Order -- 8.5 Stochastic, Continuous Systems -- 8.6 Delayed Variables -- References.