| BCA Masterfile | 17-Mar-2010 |
| Interest Category | 0 - 12 months recency |
| Ancient & Medieval History | 16,000 |
| Arts | 13,000 |
| Aviation | 6,000 |
| Business / IT | 7,000 |
| Children aged 0 - 4 years | 48,000 |
| Children aged 5 - 7 years | 42,000 |
| Children aged 7 - 12 years | 39,000 |
| Children aged 13+ | 5,000 |
| Computing | 3,000 |
| Cookery | 33,000 |
| Crafts | 9,000 |
| Erotica | 13,000 |
| Fantasy & Sci-Fi | 21,000 |
| Female Fiction | 51,000 |
| Computer Games & Software | 6,000 |
| Gardening | 17,000 |
| Health & Beauty | 29,000 |
| High Brow | 37,000 |
| History | 30,000 |
| Home Improvements | 12,000 |
| Military | 19,000 |
| Modern Warfare | 5,000 |
| Music | 9,000 |
| Nature | 17,000 |
| Navy | 6,000 |
| New Age | 23,000 |
| Pets | 5,000 |
| Popular Culture | 52,000 |
| Reference Books | 40,000 |
| Religion | 7,000 |
| Romance | 41,000 |
| Royal Family | 6,000 |
| Sport | 19,000 |
| Thrillers | 53,000 |
| Transport | 9,000 |
| Travel | 21,000 |
| TV / Films /Sci-fi | 14,000 |