This SI Guide covers the basics of: the historical background, the principles of the SI, the base units, derived units, multiples and sub-multiples, additional units, printing rules, space and time, periodic phenomena, mechanics, heat, electricity and magnetism, light, acoustics, physical chemistry, atomic and nuclear physics, ionizing radiations, characteristic numbers, and it ends with conversion tables.

A four page introduction that shows how metrology, standardization and conformity assessment are the three pillars of knowledge for developing a technical infrastructure, and there by enabling sustainable development and full participation in international trade and how they are linked together.