Part 1 is an introduction describing the three major world measurement systems: metric (SI), British and American. Part 2 gives a subject-by-subject listing of definitions, special measurements, formulae and calculations for the various subject areas. Part 3 contains 75 pages of conversion tables providing instant answers to complicated sums such as net present value for a variety of assumptions, pounds-force per square inch into kilograms-force-per square centimeter. In Part 4 are to be found abbreviations, rough conversions and a valuable body of weights and measures used historically and in the countries of the world apart from the UK and USA, as well as a small section on the historic measures of the UK. - Introduction.