| 2926 | Schiffli machinery, manufacturing | |
| 1429 | Schist, dimension, quarrying | |
| 2212 | Scholarly journals, publishers | |
| 2212 | Scholarly journals, publishing | |
| 2212 | Scholarly journals, publishing and printing combined | |
| 6599 | Scholarship trusts | |
| 2212 | Scholastic magazines and periodicals, publisher | |
| 2212 | Scholastic magazines and periodicals, publishing | |
| 2212 | Scholastic magazines and periodicals, publishing and printing combined | |
| 1912 | School bags, all materials, manufacturing | |
| 2221 | School books, printing without publishing | |
| 4520 | School building construction, general contractors | |
| 6021 | School bus operator | |
| 6021 | School bus service | |
| 3410 | School buses, assembling on purchased chassis | |
| 5010 | School buses, wholesale | |
| 5520 | School cafeteria service | |
| 5139 | School classroom equipment and supplies (except stationery), wholesale | |
| 8090 | School for telephone operators | |
| 5139 | School furniture, wholesale | |
| 5139 | School manuals, wholesale | |
| 8532 | School milk program | |
| 8090 | School of ballet | |
| 8090 | School of cooking | |
| 8090 | School of drama | |
| 8090 | School of jewellery | |
| 8090 | School of nursing, post-secondary non-university | |
| 7494 | School photographers (portrait) | |
| 7494 | School photography (i.e., portrait photography) services | |
| 5139 | School supplies (except furniture and fixtures), wholesale | |
| 5239 | School supplies, retail | |
| 2211 | School textbooks, publishers | |
| 2211 | School textbooks, publishing | |
| 2211 | School textbooks, publishing and printing combined | |
| 8090 | School, arts and crafts | |
| 8090 | School, barber | |
| 8090 | School, beauty culture | |
| 8090 | School, commercial | |
| 8010 | School, elementary | |
| 8090 | School, hairdressing and beauty culture | |