X100 or X-100 may refer to: Curtiss-Wright X-100, an experimental aircraft with tilt rotors Fujifilm X100, a series of digital cameras X-100 (house), an experimental steel house in California Lotus M90 (also Lotus X100), a concept car New South Wales X100 class locomotive, a group of rail tractors built by Chullora Railway Workshops Rockman X100, a model of headphone amplifier by Scholz Research & Development, Inc. RT.X100, a real-time PCI video editing card Triton X-100, a nonionic surfactant SS-100-X, US President Kennedy's state car in which he was assassinated in 1963