| 1. | 124.6 | |
| 2. | Microsoft | 123.2 |
| 3. | Yahoo | 114.1 |
| 4. | Time Warner | 106.3 |
| 5. | News Corp. Online | 76.3 |
| 6. | eBay | 67.4 |
| 7. | Amazon | 65.4 |
| 8. | InterActiveCorp | 64.1 |
| 9. | Apple | 50.7 |
| 10. | Wikipedia Foundation | 50.5 |
| For December. Unique audience in millions. Source: Nielsen/NetRatings NetView |
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