development of algorithms for these tasks requires the utilization of structural relationship prevalent within the sensed data. In Chapter 1, Thomason and Gonzalez discuss the formula­ tion of data representation techniques and the properties of data structures and databases in scene analysis. In view of the growing importance of database management, Chapter 2 is devoted to an overview of database management technology. In this chapter Kobayashi covers a variety of current topics. The topics discussed include system design methodology, data structure theory, semantic con­ siderations, calculus-based database operations, database management functions, and the issues of integrity, security, concurrency, and recoverabil­ ity. This chapter also discusses the end-user languages and several existing database management systems.