Load port and multi-use carrier

A load port for being configured to selectively carry one of a first wafer cassette and a second wafer cassette that is different from the first wafer cassette, the load port comprising:

• a carrying board having a carrying side;
• a gas-inlet module including two gas-inlet nozzles disposed on the carrying side of the carrying board, wherein each of the two gas-inlet nozzles has a shared gas-inlet channel;
• and
• a gas-outlet module including two gas-outlet nozzles disposed on the carrying side of the carrying board, wherein each of the two gas-outlet nozzles has a first gas-outlet channel and a second gas-outlet channel that is spaced apart from the first gas-outlet channel;
• wherein the shared gas-inlet channels of the two gas-inlet nozzles are selectively cooperated with the first gas-outlet channels of the two gas-outlet nozzles so as to be jointly configured to spatially communicate with an interior space of the first wafer cassette;
• wherein the shared gas-inlet channels of the two gas-inlet nozzles are selectively cooperated with the second gas-outlet channels of the two gas-outlet nozzles so as to be jointly configured to spatially communicate with an interior space of the second wafer cassette.