# Preface

Abramowitz and Stegun’s Handbook of Mathematical Functions with Formulas, Graphs, and Mathematical Tables is being completely rewritten with regard to the needs of today. The new DLMF (Digital Library of Mathematical Functions) will appear in a hardcover edition and as a free electronic publication on the World Wide Web. The authors will review the relevant published literature and produce approximately twice the number of formulas that were contained in the original Handbook. The DLMF will make full use of advanced communications and computational resources to present downloadable math data, manipulable graphs, tables of numerical values, and math-aware search. The authoritative status of the existing Handbook, and its orientation toward applications in science, statistics, engineering and computation, will be preserved.

Thus the utilitarian value of the Handbook will be
extended far beyond its original scope and the traditional
limitations of printed media. The term *digital library* has
gained acceptance for this kind of information resource, and our
choice of project title reflects our hope that the
NIST DLMF will be a vehicle for revolutionizing the
way applicable mathematics in general is practiced and delivered.