ABSTRACT

During the 1960s scientists and mathematicians started to use the metric system to simplify their calculations and promote communication across different nations. Even in the metric system two branches of systems coexisted for a long time: the CGS and MKS systems. The base units for length, mass and time in the two systems are:

CGS system: the centimetre, gram and second MKS system: the metre, kilogram and second

In 1960 the metric system was revised and simplified for international use. The metre, kilogram and second were kept as the basic units for

9.1 Introduction

son of the metric systems and the FPS system is given in Table 9.1.