They combine the traditional form of scientific tables, with which most scientists are familiar and comfortable, with the advantages in flexibility of a computer program. All three tables have proved to be rich in information and valuable time savers for those already using them.
Every copy includes a free disk containing a shareware program to graph the tables.
The tables are available separately or as a complete set. I will personally find it extremely useful, both the package, as a method of producing customised tables, and the manual, as a concise compendium of useful equations.