BSIM v1.00 (c) Paul H. Deal 1988 BSIM is a computer simulation which generates a 'pseudo- ecology' that can serve as an analog for actual biological systems. The program generates organisms as a function of a simulated genome which specifies the rules whereby the organisms will interact with a specified physical environment. The model for the program is a microbial aquatic ecosystem, but many of the features of the system are more general and it can be used to conceptualize a broader range of natural ecosystems. A simplified biochemical and physiological model is used to characterize the organisms based on a 13 element, mutable genome. The user has broad control over the starting conditions, both of the environment and of the 'seed' organisms. Sampling options permit following the development of the population in great detail as it responds to a dynamically changing environment with various forms evolving and disappearing with time. Concepts of population dynamics (including mutualism, commensalism, competitive exclusion, and parasitism), mass flow in ecosystems, and evolution are readily demonstrated. Realistic experiments can be performed which closely parallel those often done in actual laboratory and field settings. Many of the analytical reasoning techniques applied in general data analysis can be used to elucidate the features of the various model organisms which arise in the simulation and the lessons learned are directly applicable to laboratory and field investigations. Useage: Biology education high school and college. System Requirements: Graphics CGA, EGA, or HGA. How to Start: Type GO (press enter). Suggested Registration: $29.95 (Registered owners will receive a technical description of the underlying program logic, an experimenter's manual, and five utilities to assist in program output analysis. File Descriptions: BSIM EXE Main program. BSIM OVR Overlay program. BSIM IST Instruction manual. BSIMHELP MSG Help message file accessed by main program. PRNDOC EXE Ascii document printing program. VIEWDOC EXE Ascii document on-screen browse program. VPEBX EXE Menu program. GO BAT Program to call VPEBX menu program.