This manual was developed as part of a cooperative project between the State Historical Society of Wisconsin and the Wisconsin Division of Corrections' Green Bay Correctional Institution. As part of a new training program involving computers at Green Bay, the Director of Education approached the State Historical Society about developing a program appropriate to the training needs of the inmates that would also produce something of permanent value of the State. Based on the Society's extensive experience with the 1905 Wisconsin Census Indexing Project and the many developments in the area of automation initiated by the archives, the Society developed a project in which students would help to create a database listing and index of the 1880 Census for Wisconsin. In developing the program they hoped to create a model that would have wide applicability not only for other states and censuses but for historical demographic data in general. The manual comprises six sections: (1) Introduction; (2) The 1880 Census; (3) A Few Definitions; (4) Using the Computer; (5) Census Data Entry; and (6) Hints for Solving Problems and Additional Information. Appendices include population totals for Wisconsin counties, 1880; population totals for towns, villages, and wards of cities, 1880; and a copy of the 1880 Census Program written in Applesoft BASIC. (THC)