This document discusses the history and development of harmonization, GMPs, and validation. It covers the early concepts and guidance from organizations in the 1980s such as the FDA, FIP, EOQC, APV, and PIC. It then discusses further regulatory guidance in the 1990s and the roles of organizations like PIC/S, WHO, ICH, IPEC, pharmacopeias, ISO, PDA, and ISPE in harmonizing standards. The document also briefly discusses medical device harmonization through organizations like the GHTF and concludes that exceptional progress has been made in harmonizing regulations globally to facilitate international supply of pharmaceuticals and medical devices.