A computer readable medium may stores a computer program including instructions for ordering a computer mounted on the processing device. The instruction may order the computer to perform acquiring a first IP address assigned to the function performing device, acquiring a unique network device name provided to the function performing device by using the first IP address, attempting to acquire a second IP address by using the network device name, determining whether the second IP address identical to the first IP address has been acquired, and installing the software in which the network device name is set as a destination of the function performing instruction in a case where it is determined that the second IP address which is identical to the first IP address has been acquired.