Operation Oyster was a bombing raid made by the Royal Air Force (RAF) on 6 December 1942 upon the Philips works at Eindhoven, Netherlands. The Philips company was a major producer of electronics equipment, including vacuum tubes for radio communication. Prior to the Battle of the Netherlands in 1940, Philips was known to be a leading research firm in infrared and radar technology. To ensure accuracy and minimise casualties among the Dutch citizens, the raid had to be undertaken during the day.