U.S. agriculture appears to be at a major turning point in terms of technological change and innovation as it enters the information age[1]and at the heart of the information revolution is the microcomputer. This handbook explains in practical terms how computers are being used in agriculture and analyzes some of the issues surrounding present and potential computer applications. The authors define agriculture in the broadest possible terms, including the traditional aspects of farming, the industries supporting agriculture, service bureaus related to agriculture, classroom instruction and youth development, and the rural family and community. Considered are specific ways microcomputers are changing agriculture, the exact nature of these changes, and how agriculturists are currently adapting microprocessor technology to make agriculture more efficient and viable. Also included is a discussion of the computer software and hardware used in agriculture today, hardware and software purchasing strategies for both individuals and institutions, and sources of information on computer applications in agriculture.