At the heart of SAS is Base SAS software, which provides tools that are essential for mastering the tasks common to your business applications. This comprehensive reference manual provides you with a complete selection of reference entries for individual elements of the SAS language in an alphabetized, encyclopedia format. It contains data set options, formats and informats, functions and CALL routines, statements and system options that support Base SAS, and how to use the DATA step debugger. You can use this title for complete reference information for all features of the SAS language, except procedures (documented elsewhere), that are not specific to an operating system. SAS Language Reference: Concepts is a companion volume to this title, providing essential concepts for SAS features, the DATA step, and SAS files. This title is also available online. This title is intended for users who have previous experience with SAS or who have at least an intermediate level of expertise with another programming language. This title is also available free online from SAS Publishing.