Definition:Common Logarithm/Also known as

Common Logarithm: Also known as
Common logarithms are sometimes referred to as Briggsian logarithms or Briggs's logarithms, for.

In elementary textbooks and on most pocket calculators, $\log$ is assumed to mean $\log_{10}$.

This ambiguous notation is not recommended, particularly since $\log$ often means base $e$ in more advanced textbooks.