| Category | Users | Items | Ratings | |||
|---|---|---|---|---|---|---|
| Arts Crafts and Sewing | 11,679 | 842 | 16,483 | ratings | reviews | metadata |
| Automotive | 9,232 | 440 | 9,738 | ratings | reviews | metadata |
| Books | 73,803 | 18,814 | 106,753 | ratings | reviews | metadata |
| CDs and Vinyl | 0 | 0 | 0 | ratings | reviews | metadata |
| Cell Phones and Accessories | 54,673 | 2,250 | 85,612 | ratings | reviews | metadata |
| Digital Music | 458 | 38 | 464 | ratings | reviews | metadata |
| Electronics | 187,642 | 6,579 | 302,808 | ratings | reviews | metadata |
| Grocery and Gourmet Food | 2,208 | 311 | 2,353 | ratings | reviews | metadata |
| Home and Kitchen | 28,862 | 1,884 | 34,637 | ratings | reviews | metadata |
| Industrial and Scientific | 5,755 | 375 | 8,052 | ratings | reviews | metadata |
| Kindle Store | 0 | 0 | 0 | ratings | reviews | metadata |
| Movies and TV | 14,942 | 2,752 | 25,409 | ratings | reviews | metadata |
| Musical Instruments | 19,034 | 1,399 | 30,150 | ratings | reviews | metadata |
| Office Products | 22,577 | 1,021 | 29,559 | ratings | reviews | metadata |
| Sports and Outdoors | 28,741 | 1,784 | 33,367 | ratings | reviews | metadata |
| Toys and Games | 16,859 | 1,186 | 22,718 | ratings | reviews | metadata |
| Overall | 400,883 | 39,675 | 708,103 |