The various transportation logistics tasks, such as order processing, order fulfillment, transportation of goods and tracking, are assigned to individual client/server objects which make up the building blocks of the computerized logistics management system. A tokenized message handling scheme allows client and server objects to share information, even where the respective data types do not match. An external processing manager provides script handling services to other client applications, allowing those applications to modify the performance of other program objects and to communicate with the outside world.