Keith Harwood was a British recording engineer, most notable for his work at Olympic Studios with such musicians as David Bowie, the Pretty Things and Ron Wood. Harwood collaborated on engineering the Rolling Stones albums It's Only Rock 'n' Roll (1974) and Black and Blue (1976) with brothers Andy and Glyn Johns, respectively. He also engineered a number of Led Zeppelin albums, including Houses of the Holy (1973), Physical Graffiti (1975) and Presence (1976).