NETWORK 2000, (developed by Woodam Chung and John Sessions. Forest Engineering, College of Forestry, OSU) is a software program for optimizing variable and fixed cost, multiple period transportation problems. NETWORK 2000 provides users with three different heuristic algorithms for solving various transportation problems. The algorithms include one based on standard shortest path techniques, and two probabilistic algorithms, simulated annealing and great deluge. Each algorithm has an intelligent rule for neighborhood search.