|
| 9112 | Professional associations | |
| 9241 | Professional baseball clubs | |
| 2221 | Professional books, printing without publishing | |
| 2211 | Professional books, publishers | |
| 2211 | Professional books, publishing | |
| 2211 | Professional books, publishing and printing combined | |
| 9241 | Professional football clubs | |
| 5110 | Professional machinery and equipment, wholesale agents and brokers | |
| 5150 | Professional machinery, equipment and supplies, wholesale | |
| 2212 | Professional magazines and periodicals, publisher | |
| 2212 | Professional magazines and periodicals, publishing | |
| 2212 | Professional magazines and periodicals, publishing and printing combined | |
| 9241 | Professional or semiprofessional sports clubs | |
| 8030 | Professional school (university, college level) | |
| 8030 | Professional schools (e.g., dental, engineering, law, medical) | |
| 1810 | Professional service apparel, washable, men's and boys', cut and sewn from purchased fabric | |
| 1810 | Professional service apparel, washable, women's, misses' and girls', cut and sewn from purchased fabric | |
| 9241 | Professional skiers, independent (i.e., participating in sporting events) | |
| 9241 | Professional sports clubs | |
| 9241 | Professional sports instructors for golf, skiing, swimming | |
| 9241 | Professional sports promoters, without facilities | |
| 9112 | Professional standards review boards | |
| 7421 | Professionnal career advancement consultant | |
| 2520 | Profile shapes (e.g., plate, rod, sheet), laminated plastics, manufacturing | |
| 2520 | Profile shapes (e.g., rod, tube), non-rigid plastics, manufacturing | |
| 2520 | Profile shapes, polystyrene foam, manufacturing | |
| 3313 | Programmers, process type, manufacturing | |
| 7220 | Programming languages and compilers, publishing | |
| 7220 | Programming languages and compilers, publishing (including designing and developing), packaged | |
| 7220 | Programming services, computer, custom | |
| 9213 | Programming, cable network | |
| 9213 | Programs producing, television | |
| 2221 | Programs, for sporting events, printing without publishing | |
| 7421 | Project management services (except construction management) | |
| 2927 | Projectiles (except guided missile), jet propulsion, manufacturing | |
| 5139 | Projection equipment (e.g., motion picture, slide), photographic, wholesale | |
| 3320 | Projection equipment (i.e., motion picture, slide, overhead), manufacturing | |
| 5139 | Projection equipment, home movie apparatus and accessories, wholesale | |
| 3320 | Projection lenses, manufacturing | |
| 3320 | Projection screens (i.e., motion picture, slide, overhead), manufacturing | |
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