An optical transmission apparatus applicable to an optical interconnection apparatus for interconnection between stacked IC chips, and a process of mounting elements for manufacturing such an apparatus are disclosed. A portable programmable computer device that a user can readily plug into a diagnostic connector port of the vehicle for providing the controlling, monitoring, and evaluating functions. The main clock generator circuit generates a main clock signal when the external signals have been asserted for a predetermined amount of time. Even though the level of a common component might change, the clock signal can be recovered accurately and the size of the clock recovery circuit can be reduced. As a result of retrieval in the buffer which is carried out by a CPU, when the firmware required for the execution of an operation input by a user is not present in the buffer, the CPU controls a sequencer to transfer the necessary firmware from the memory to the buffer. The present invention is a process wherein card account numbers are only assigned to electronic gift cards when viewed or accessed by the end customer, and thus the present invention limits the requirement of assigning account numbers excessively in bulk and eliminating the waste of unused account numbers and unused plastic.