Considers topics ranging from elementary mathematics through beginning calculus, each article written at a level suitable to the difficulty of the particular topic. The alphabetical articles includes such features as a definition, an explanation, and examples with solutions. Cross-references provide, among other links, directions to more or less difficult discussions. Appendices provide natural and common logarithmic tables, values of trigometric functions, and conversions. No date is noted for the first edition. Annotation c. by Book News, Inc., Portland, Or.