An input system includes a first base portion and a second base portion that each include a keying surface. A base portion manipulation mechanism couples the first base portion to the second base portion. The base portion manipulation mechanism includes a moveable coupling that is configured to allow relative movement of the first base portion and the second base portion into at least one of a tented orientation and a splayed orientation. A locking mechanism provides a biasing force that causes an engagement between portions of the moveable coupling that resists relative movement of the first base portion and the second base portion absent an unlocking force, wherein the locking mechanism is responsive to the unlocking force that overcomes the biasing force to allow relative movement of the first base portion and the second base portion into the at least one of the tented orientation and the splayed orientation.