Section 16 Machinery and mechanical appliances; electrical equipment; parts thereof; sound recorders and reproducers, television image and sound recorders 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...; magnetic readers..., nes 84 71 50 Processing units other than those of subheading 8471.41 or 8471.49, whether or.. Commodity Code Description 84 71 50 00 Processing units other than those of subheading 8471.41 or 8471.49, whether or..