This compilation of annual reports of 151 New York State institution libraries for the year ending March 31, 1980, presents data on total resident population, library materials, dollar expenditures, and weekly staff hours. The types of institutions represented include correctional services, division of substance abuse services, education, health, office of mental health, office of mental retardation, and developmental disabilities and youth. In a separate table, a comparative summary indicates annual library expenditures for salary, materials, and other categories by institution type since 1973, including percentages of increase and decrease. Appendices comprise a key to the abbreviations used; a directory of state institutions which includes their addresses, the state department and system with which they are associated, and the names of both the librarian and the head of the institution; and a list of public library systems showing the institutions in the same geographical area. (RBF)