TERMINAL DEVICE, INFORMATION PROCESSING METHOD, AND PROGRAM FOR TERMINAL DEVICE

Provided is a terminal device and the like that can switch a mode of operation as a terminal device in relation to an on-board device to which the terminal device is attached. A terminal device T that is attached to an attachment target device M and that communicates with the attachment target device M comprises a switching means that switches a mode of operation of the terminal device T on the basis of a state of attachment to the attachment target device M and a state of communication with the attachment target device M.