This report provides documentation and user information for FPL-PELPS, a personal computer price endogenous linear programming system for economic modeling. Originally developed to model the North American pulp and paper industry, FPL-PELPS follows its predecessors in allowing the modeling of any appropriate sector to predict consumption, production and capacity by technology, and trade within or among several regions or countries. The theoretical structure is that of spatial equilibrium modeling under competitive market assumptions. This report contains a mathematical description of the system, including its extensions from previous versions, and a detailed user's guide with an application of FPL-PELPS.