The present invention is an information processing terminal capable of preventing leakage of identification information while adopting a general-purpose OS to provide development environment for a free application software and using a common keyboard for entry of identification number information and entry of other information. The information processing terminal is so constituted that a management mechanism comprises an execution management unit for operating a first and second information processing mechanisms, when a trigger detecting unit detects a trigger operation, so as to restrict execution of a first application and start a second application.