The validity of resource sharing activities among libraries in Tanzania is examined, and the main types of libraries in the country are summarized with emphasis on cooperation between libraries. Some areas that need cooperative activity are identified as selection, ordering, processing, storage, conservation and protection of books, interlibrary loan and staff recruitment, and training. A survey of the steps already taken by some libraries towards cooperation and some of the problems encountered by these libraries in trying to establish cooperative activities are also included. (Author/JEG)