This document discusses principles of Good Laboratory Practice (GLP). It provides background on GLP, including that it aims to ensure safety, consistency and quality in chemical and pharmaceutical non-clinical testing. GLP was first introduced in the 1970s and aims to prevent fraudulent lab practices. It outlines the Organization for Economic Co-operation and Development's role in harmonizing GLP standards internationally and describes the key aspects of GLP compliance, including facilities, equipment, test systems, documentation and personnel responsibilities.