The document discusses different types of decision support systems including geographic information systems, expert systems, neural networks, fuzzy logic, genetic algorithms, and intelligent agents. It provides examples of how different companies like Southwest Airlines, P&G, Ford, and Edison Chouest use these systems to analyze spatial data, apply reasoning, learn from data, handle imprecise information, optimize solutions, and perform automated tasks. The document concludes that artificial intelligence has made computers more functional but they still lack human emotional aspects and may not completely replace people.