Section 16 MACHINERY AND MECHANICAL APPLIANCES; ELECTRICAL EQUIPMENT; PARTS THERE OF; SOUND RECORDERS AND REPRODUCERS, TELEVISION IMAGE AND SOUND RECORD ERS AND REPRODUCERS, AND PARTS AND ACCESSORIES OF SUCH ARTICLES 84 Nuclear reactors, boilers, machinery and mechanical appliances; parts thereof 84 71 Automatic data processing machines and units thereof; magnetic or optical reader 84 71 50 84 71 50 00 Commodity Code Description 84 71 50 00 00 - Processing units other than those of sub-heading 8471.41 or 8471.49, whether or not co