This note reports on a project to develop a codebook and data set for the analysis of bilateral civilian nuclear power agreements. It briefly provides a rationale for treaty coding projects of this kind, a description of the codebook and of the data set to be used with it, and a general discussion of some of the problems encountered in the development of the codebook. The marriage of treaties and computers is not new. In quantitative studies of international relations, treaties have been used as indicators or points on measurement scales (Burgess and Lawton, 1972; Azar and Ben-Dak, 1975), as independent variables (e.g., Singer and Small, 1968), and as guides to state interaction patterns (e.g., Holsti and Sullivan, 1969). In the field of international law, computers have been used to store text, to create indices of treaties or documents (e.g., Jackson, 1969; Rohn 1974), to track signatures, ratifications and withdrawals, to develop 'treaty profiles' of different states (e.g., Rohn, 1976) or to illuminate particular points of international law (e.g., Gamble, 1980).' With, perhaps, the exception of work based on Rohn (1974), these various uses do not seem to involve a close quantitative analysis of the contents of treaties. Developing a detailed codebook for the analysis of treaty contents would be a daunting task if many different types of treaties are included in the data set. If, however, the researcher's focus is on a clearly defined set of agreements, with a definable set of concerns, problems, and responses, the close analysis of treaty contents through computer-assisted means may be both possible and desirable. This note reports on the author's efforts to develop a codebook for the detailed computer analysis of the contents of one such defined set of agreements: bilateral interstate civilian nuclear cooperation agreements, with special attention to safeguards and non-proliferation issues. A vast literature has developed in the area of nonproliferation (see Potter, 1982), and in both general and country-specific studies of agreements and policies related to nuclear exports (e.g., Hunt, 1977; Duffy, 1978; Park, 1979; Katz and Marwah, 1982). Here again, a close quantitative examination of treaty contents seems to be absent, although some qualitative studies may exist (e.g., United States Library of Congress, 1976). While this note focuses on nuclear cooperation agreements, I also touch on some general issues regarding the rationale