409	 CL- An Environment for a Compiler	 A flexible large-scale programming system to facilitate the solution of information processing problems and to provide intercommunication between programs and or programmers has been developed and realized on the IBM computer. The system is based on a master file concept and has provisions for accepting storing and retrieving both descriptions and instances of large and complex data sets as well as algorithms defined on these data sets. Both data and algorithms may be expressed in a family of command and descriptive languages. The concept of distinct data descriptions and the content and use of such descriptions are discussed in some detail.
