In one example, a method to transmit data to one or more devices is provided. One or more data files are transmitted cyclically via one or more respective channels, such as a radio-frequency channel, a request for at least one desired data file is received from a device, and a message identifying a respective channel associated with the at least one desired data file is transmitted to the device. The at least one desired data file may be transmitted cyclically via at least one selected channel. The at least one desired data file may comprise one or more software applications, such as an operating system. Other systems and methods of assembly and data transmission are also described.