Cos - Definition and Overview

Cos is:

• In geography, Kos or Cos (Gr. Kòs), a Greek island in the Dodecanese group of islands, in the Aegean Sea.
• In government, Cos, a commune in the Ariège département in France.
• In government, an abbreviation for Chief of Staff.
• In mathematics, an abbreviation for cosine.
• In computing, it has several meanings.
• In computing, an operating system like DOS.
• In business, an abbreviation for Cost of sales.
• In television, Cos was a 1976 American comedy series starring Bill Cosby.
• In food, it is a variety of lettuce also known as romaine.
• cos (or 'cos) is an abbreviation for "because".