Knowledge Master Open
（重定向自KMO）
The Knowledge Master Open (commonly known as Knowledge Masters or KMO) was a computer-based semiannual worldwide academic competition produced by Academic Hallmarks. During KMO competitions, teams of students from many schools earned points by answering multiple-choice questions quickly and accurately. The questions included fifteen subject areas: American history, world history, government, recent events, economics & law, geography, literature, English, math, physical science, biology, earth science, health & psychology, fine arts, and useless trivia.