Modern Dictionary of Electronics, 7th Edition

International System of Units (SI)

The SI is constructed from seven base units for independent quantities plus supplementary units for plane solid angles as given in Table 1.

Table 1

SI base and supplementary units

Units for all other quantities are derived from these nine units. Table 2 lists seventeen SI derived units with special names. These units are expressed as products and ratios of the nine base and supplementary units without numerical factors.

Table 2

SI Derived units with special names

All other SI derived units, such as those ...