Counting is a fundamental mathematical process that involves the ADDITION of numbers. ADDING (6 letters) is the simplest form of counting, which involves the combination of two or more numbers to get a total. INCLUDING (9 letters) is similar to ADDING, but it involves the inclusion of all elements in a set. Totalling (9 letters) is the process of finding the sum of two or more numbers. ADDITION (8 letters) is the process of combining two or more numbers to get a total. TALLYING (8 letters) is the process of counting items in a set and recording the number of items. COMPUTATION (11 letters) is the process of performing calculations using numbers. WHOS (4 letters) is an acronym for 'What's Happening On Site', which is a term used to describe the process of counting items on a site.