Great text for anyone in an engineering, science or math field. Although most personal computers have processors capable of evaluating these tables, there is still no comparison to being able to reference the value instantly. Especially useful for quick checks. I can always get more accurate results online or with interpolation, but I bask park answer helps you know if the extra work is required. Overall the book is put together well. The list of special functions is impressive and it also contains many other useful tables.