| 511 | Test Gauges | Company Product |
| 512 | Test Handlers | Company Product |
| 513 | Test Measurement & Calibration | Company Product |
| 514 | Test Plugs | Company Product |
| 515 | Test Probes | Company Product |
| 516 | Test Pumps | Company Product |
| 517 | Test Sets | Company Product |
| 518 | Tester | Company Product |
| 519 | Testers | Company Product |
| 520 | Testiing | Company Product |
| 521 | Testing | Company Product |
| 522 | Testing Equipment | Company Product |
| 523 | Testing Instruments | Company Product |
| 524 | Testing Laboratories | Company Product |
| 525 | Testing Pumps | Company Product |
| 526 | Testing Services | Company Product |
| 527 | Tetra Alkyl Ammonium Bromides | Company Product |
| 528 | Tetrabasic Lead Sulhpate | Company Product |
| 529 | Tetrabasic Lead Sulphate | Company Product |
| 530 | Tetracycline | Company Product |
| 531 | Tetracycline Salts | Company Product |
| 532 | Tetrahydrofuran | Company Product |
| 533 | Textile Chemicals | Company Product |
| 534 | Textile Design | Company Product |
| 535 | Textile Fibres | Company Product |
| 536 | Textile Machineries | Company Product |
| 537 | Textile Manufacuturers & Wholesalers | Company Product |
| 538 | Textile Merchants | Company Product |
| 539 | Textile Printers | Company Product |
| 540 | Textile Retailers | Company Product |