In the Research Center for Nuclear Physics, Osaka University, as a part of the joint utilization activities, the expenses for computation in joint utilization have been provided since 1976, and have supported the (mainly theoretical) numerical calculation in the field of nuclear physics. As for these expenses for computation, the subjects of 50,000 yen or more are collected every year, and by the opinion of the referees and through the discussion of the ad hoc committee, subjects are adopted. When these expenses are used, after finishing the use, the simple report of definite form and the detailed report regarding the contents of computation are to be submitted. The former includes the period of computation, the expense of computation, the publication of results, the summary of main results and so on. In the latter report, English abstract, the results obtained by computation and the explanation of physical contents, the new development of computation technology, difficulty and the method of its solution, the subroutines and functions used for computation and their functions, block diagrams and so on are included. In this book, 28 latter reports of the use in fiscal year 1991 are collected. (K.I.).