Indigenous Australian seasons are differently classified than the traditional four-season calendar used by most western European peoples. Aboriginal Australians and Torres Strait Islander people have distinct ways of dividing the year up. Naming and understanding of seasons differed between groups of Aboriginal peoples, and depending on where in Australia the group lives. The Australian Bureau of Meteorology and the CSIRO have both worked with various groups to produce information about a number of Aboriginal and Torres Strait Islander seasonal calendars.