| N | Item | Com. |
| 1 | Machine Dismantling Shops | 2 |
| 2 | Machine Shops | 467 |
| 3 | Machine Shops For Boilers | 1 |
| 4 | Machine Tools | 40 |
| 5 | Machinery | 15 |
| 6 | Machinery Cleaning | 2 |
| 7 | Machinery Imports | 8 |
| 8 | Machinery Maintenance | 1 |
| 9 | Machinery Remote Controls | 2 |
| 10 | Machinery Transport Services | 2 |
| 11 | Magazines | 49 |
| 12 | Magicians | 10 |
| 13 | Magnetic Descale | 1 |
| 14 | Magnetic Media Duplication | 4 |
| 15 | Magnetic Tapes | 5 |
| 16 | Magnets | 9 |
| 17 | Magnifying Glasses | 1 |
| 18 | Mail | 32 |
| 19 | Mail Boxes | 2 |
| 20 | Mail Processing Machines | 2 |
| 21 | Mail Sorting Mechanization | 1 |
| 22 | Maintenance Engineering | 1 |
| 23 | Mall | 2 |
| 24 | Malt Manufacturing | 1 |
| 25 | Management Consultants | 82 |
| 26 | Mannequin Repair Services | 1 |
| 27 | Mannequins | 9 |
| 28 | Manometers | 24 |
| 29 | Mantencion de Transformadores | 1 |
| 30 | Maps | 9 |
