Home Energy Applications on Your Personal Computer by David E. Pitts is a 1983 collection of practical type-in programs designed to help homeowners analyze and reduce household energy costs using a personal computer. Supporting systems including the Commodore 64, VIC-20, PET/CBM, Atari, Apple, TI-99/4A, Radio Shack Color Computer, and OSI, the book provides tools for maintaining an energy-use database, plotting utility consumption and costs, estimating electricity usage, auditing heating and cooling efficiency, studying heat conduction, comparing air conditioners, evaluating window heat loss and solar gain, assessing window shading, and estimating the benefits of ceiling fans. Rather than offering generic conservation advice, its programs use information about a home, local climate, utility expenses, and potential improvements such as insulation, storm windows, weather-stripping, or thermostat changes to project savings and help readers make informed energy-efficiency investments.