The document discusses color matching systems used in computer systems. It describes how color is perceived by the human eye and influenced by light, objects, and surroundings. It then explains several color order systems used historically like Ostwald and Munsell to define and communicate color. The CIE (Commission Internationale de l'Eclairage) color system from 1928 is now the international standard used in color industries. The document outlines the components and modules of a computer color matching system, which uses spectrophotometry and software to efficiently formulate colors, standardize processes, and provide quality control for industries.