This publication is a guide to using the Microcomputer Dairy Farm Business Summary (Miao DFBS) computer program for analyzing the fmancial and production pedormance of individual dairy farm businesses. County Cooperative Extension agents and regional specialists are the intended audience, however, college faculty in other states may also find this publication of value. Farm business summary and analysis projects have long been a basic part of the agricultural Extension program in New Yark State. Records submitted by New Yark State dairy farmers provide the basis for many Extension educational programs and the data for applied research studies and classroom teaching.