Editing IBM 5576-C01 Keyboard (section)

==Design==
Unlike [[IBM 5576-003 Keyboard | 5576-003]] and [[IBM 5576-A01 Keyboard | 5576-A01]], it uses IBM's membrane buckling spring mechanism instead of Brother Industries' buckling spring mechanism. Therefore, it does not have [[Rollover, blocking_and ghosting#n-key rollover | N-key rollover]] and the construction includes a curved backplate. The one-piece PBT dye-sublimated keycaps are compatible with Model M buckling spring keyboards. The TrackPoint II stick and mouse button module is identical to the one used in Model M13 and therefore the controller card of 5576-C01 is very similar to the one of M13 made in the same era (by Lexmark or Maxi Switch). Other than the flip feet used in most Model M keyboards, the 5576-C01 also features a big rotating foot. No official explanation from IBM Japan was given about the function of the rotating foot, it is suggested that the purpose of implementing the foot is to allow the keyboard to be parked on its back wall, allowing the user to increase usable desk space as needed or to prevent the keyboard from slipping off a small lapdesk.