Businesses involved in the the following industries (as defined by the SIC Codes 2007) can use the ProQuin product as defined in the table below.
| Options |
 |
 |
 |
| 68 Real estate activities |  |  |  |
| 68.1 Buying and selling of own real estate |  |  |  |
| 68.10 Buying and selling of own real estate |  |  |  |
| 68.2 Renting and operating of own or leased real estate |  |  |  |
| 68.20 Renting and operating of own or leased real estate |  |  |  |
| 68.20/1 Renting and operating of Housing Association real estate |  |  |  |
| 68.20/2 Letting and operating of conference and exhibition centres |  |  |  |
| 68.20/9 Letting and operating of own or leased real estate (other than Housing Association real estate and conference an |  |  |  |
| 68.3 Real estate activities on a fee or contract basis |  |  |  |
| 68.31 Real estate agencies |  |  |  |
| 68.32 Management of real estate on a fee or contract basis |  |  |  |