US Patent 9003080 Managed access to peripherals of a service terminal

Managed access to one or more peripherals of a service terminal is provided. A master controller controls access to the peripheral(s) by applications of the service terminal, wherein only a single application can access the peripheral(s) at a time, by identifying an application of the applications for placing into an on-focus state in order to enable access to the peripheral(s) by the identified application, and placing the identified application into the on-focus state, where access to the peripheral(s) by the identified application is enabled. The remaining applications of the applications execute in an off-focus state in which the master controller simulates, for the remaining applications, connectivity to the peripheral(s), and in which access to the peripheral(s) by the remaining applications is disabled transparent to the remaining applications while the access to the peripheral(s) by the identified application is enabled.