Logarithm
Before computers, the table of logarithms was an important tool. In 1617, Henry Briggs printed the first logarithm table. This was soon after Napier's basic invention. Later, people made tables with better scope and precision. These tables listed the values of  and  for any number  in a certain range, at a certain precision, for a certain base  (usually ). For example, Briggs' first table contained the common logarithms of all integers in the range 1–1000, with a precision of 8 digits.