| 54122 | Office buildings, general construction of | |
| 85330 | Office buildings, general maintenance of | |
| 72122 | Office buildings, own-account sales of | |
| 72112 | Office buildings, rental or leasing of | |
| 73123 | Office equipment (excl. computers), rental or leasing of, without operator | |
| 62383 | Office equipment, mail order retail trade services of | |
| 62183 | Office equipment, non-specialized store retail trade services of | |
| 38240 | Office equipment, of precious metal (excl. pens and pencils) | |
| 62483 | Office equipment, other non-store retail trade services of | |
| 62583 | Office equipment, retail trade services of, on a fee or contract basis | |
| 61283 | Office equipment, wholesale trade services of on a fee or contract basis | |
| 61183 | Office equipment, wholesale trade services of, except on a fee or contract basis | |
| 62383 | Office furniture, mail order retail trade services of | |
| 62183 | Office furniture, non-specialized store retail trade services of | |
| 62483 | Office furniture, other non-store retail trade services of | |
| 73123 | Office furniture, rental or leasing of | |
| 62583 | Office furniture, retail trade services of, on a fee or contract basis | |
| 62283 | Office furniture, specialized store retail trade services of | |
| 61183 | Office furniture, wholesale trade services of, except on a fee or contract basis | |
| 61283 | Office furniture, wholesale trade services of, on a fee or contract basis | |
| 73123 | Office machinery (excl. computers), rental or leasing of, without operator | |
| 88767 | Office machinery and equipment (except computers and peripheral equipment) manufacturing services | |
| 87333 | Office machinery, installation of | |
| 62383 | Office machinery, mail order retail trade services of | |
| 87120 | Office machinery, maintenance and repair of | |
| 62183 | Office machinery, non-specialized store retail trade services of | |
| 62483 | Office machinery, other non-store retail trade services of | |
| 62583 | Office machinery, retail trade services of, on a fee or contract basis | |
| 62283 | Office machinery, specialized store retail trade services of | |
| 61183 | Office machinery, wholesale trade services of, except on a fee or contract basis | |
| 61283 | Office machinery, wholesale trade services of, on a fee or contract basis | |
| 83115 | Office management, consulting services concerning | |
| 73123 | Office safes, rental or leasing of | |
| 91138 | Offices, copyright, administrative services related to the operation of | |
| 91138 | Offices, patent, administrative services related to the operation of | |
| 83811 | Offices, photographing of persons or other subjects in | |
| 38704 | Offices, prefabricated or sectional, of concrete | |
| 38702 | Offices, prefabricated or sectional, of metal | |
| 38703 | Offices, prefabricated or sectional, of plastics | |
| 38701 | Offices, prefabricated or sectional, of wood | |