A fastening system for hanging mountable overhead containers is provided. The system includes a memory device having a memory buffer a first access port connected to the memory buffer and a second access port connected to the memory buffer. The apparatus, in this embodiment, further includes N waveguide arms integrated on the substrate, having modulators and coupled between the first and second 1\xd7N couplers. A controller controls the amount of exposure based on the intensity of EUV light detected by the EUV-light intensity detector. If the job is not executable, whether or not the job is executable on condition that a job history is transmitted to the job history management apparatus is further determined.