Abstract: A dual connection peripheral device has a housing. A captive input/output cable is disposed at least partially within the housing and selectively connects the dual connection peripheral device to a host device. An auxiliary input/output port is disposed on the housing and selectively connects to the host. A control circuit is operatively coupled to the captive input/output cable and auxiliary input/output port and selectively connects one of the captive input/output cable and the auxiliary input/output port to the host device.

Abstract: A modular track and dolly system for cinematography includes a set of detachable, human-portable track sections, each including a unitary rigid frame supporting first and second spaced apart guide rails and having at least at least one connection plate at each longitudinal end of the frame providing a precise joint interface surface for aligning adjacent track sections. The rigid frame may include a pair of longitudinally extending chords connected by perpendicular struts and two or more web members extending at an oblique angle relative to the chords and struts. Each track section may also include a lightweight subframe made up of an assembly of longitudinal members and lateral stringers connected together, with the rigid frame being supported on and attached to the subframe. A dolly for carrying a cinematography robot is guided by the guide rails and may include a motor-driven pinion that engages a rack on the track.