This report is a summary of an 8-week pilot study of the current uses of unobtrusive measures in the various fields of social services. Unobtrusive measures are simply clues, traces, signs, patterns, or records that allow the indirect or inferential evaluation of phenomena. The survey suggests that unobtrusive measures have long been widely used in all of the fields studied--public health, mental health, hospital administration, law, personnel and organizational management, and higher education--to fulfill the following functions: (1) evaluation of past organizational performances (feedback); (2) evaluation of on-going operations (feedforward); (3) interpersonal decisionmaking (hiring, firing, and promotions); and (4) estimation of population and organizational conditions. A directory and examples of organizations and persons currently using unobtrusive measures is included by the following fields: hospital administration and accreditation; public health, epidemiology, and sanitation; mental health, psychiatry, and environmental planning; banking, personnel evaluation, and organizational management; social, economic accounting, and planning; law; noise monitoring; and higher education accreditation and evaluation. Proposals for subsequent research and development are also included. (Author/HS)