We propose to develop a suite of PC/workstation programs (CCON) that greatly improve contamination-prediction procedures. CCON will reduce computation times by a factor of 10 to 1000 and engineering time by a factor of 2 to 4. CCON will also be more user friendly. Several innovations give CCON its advantages: (1) a powerful but inexpensive graphical method for developing the model either independently or from CAD, thermal or structural models; (2) a method for modifying models from other disciplines to meet the modeling needs of the contamination discipline; (3) an automated method for importing thermal data into a contamination model that differs geometrically; and (4) a much faster version of an industry-standard simulation program. CCON addresses directly NASA's 20.05 topic: Space Environmental Effects and Contamination under subtopic "...mass-transport models to predict molecular direct-transfer, backscattering, particle transport, and surface effects." The innovation would become part of our company's software product line. NASA and industry will benefit by the less costly, more thorough models generated by CCON, and by response times for contamination analyses that permit the contamination technology to participate more interactively in the design effort.