| 3421 | Ship Loading & Unloading Equipment | Company Product |
| 3422 | Ship Propulsion Control Systems | Company Product |
| 3423 | Ship Chandlers | Company Product |
| 3424 | Ship Chandlers' Supplies | Company Product |
| 3425 | Ship Cranes | Company Product |
| 3426 | Ship Cleaning | Company Product |
| 3427 | Ship Fueling | Company Product |
| 3428 | Ship Classification Societies | Company Product |
| 3429 | Ship Building Equipment & Supplies | Company Product |
| 3430 | Ship Builders & Repairers | Company Product |
| 3431 | Ship Bunkering | Company Product |
| 3432 | Ship Brokers | Company Product |
| 3433 | Ship Agency | Company Product |
| 3434 | Slotted Angle Shelvings | Company Product |
| 3435 | Shingles | Company Product |
| 3436 | Shelves | Company Product |
| 3437 | Shellacs | Company Product |
| 3438 | Sheetmetal Working Machines | Company Product |
| 3439 | Sheetmetal Specialties | Company Product |
| 3440 | Sheetmetal Punching Machines | Company Product |
| 3441 | Slitting Shearing Machines | Company Product |
| 3442 | Sheetmetal Folding Machines | Company Product |
| 3443 | Sheetmetal Nibbling Machines | Company Product |
| 3444 | Shearing Machines | Company Product |
| 3445 | Sharpening Services | Company Product |
| 3446 | Sharpening Stones | Company Product |
| 3447 | Shaping Machines | Company Product |
| 3448 | Shark's Fin | Company Product |
| 3449 | Shampoo | Company Product |
| 3450 | Shaft, Torque & Horsepower Measuring Instruments | Company Product |