Everything LaTeX numbers for you has a counter associated with it.
  The name of the counter is the same as the name of the environment or
  command that produces the number, except with no \.  Below is a list
  of the counters used LaTeX's standard document styles to control
  numbering.

  part            part            figure          enumi
  chapter         subparagraph    table           enumii
  section         page            footnote        enumiii
  subsection      equation        mpfootnote      enumiv
  subsubsection