| Category | Users | Items | Ratings | |||
|---|---|---|---|---|---|---|
| Arts Crafts and Sewing | 590 | 73 | 599 | ratings | reviews | metadata |
| Automotive | 482 | 68 | 485 | ratings | reviews | metadata |
| Books | 232,204 | 43,348 | 443,536 | ratings | reviews | metadata |
| CDs and Vinyl | 32,792 | 1,321 | 45,036 | ratings | reviews | metadata |
| Cell Phones and Accessories | 121,089 | 5,380 | 156,060 | ratings | reviews | metadata |
| Digital Music | 1,155 | 56 | 1,176 | ratings | reviews | metadata |
| Electronics | 422,228 | 18,605 | 716,744 | ratings | reviews | metadata |
| Grocery and Gourmet Food | 11,519 | 1,615 | 12,529 | ratings | reviews | metadata |
| Home and Kitchen | 215,739 | 12,764 | 275,444 | ratings | reviews | metadata |
| Industrial and Scientific | 4,286 | 629 | 4,444 | ratings | reviews | metadata |
| Kindle Store | 0 | 0 | 0 | ratings | reviews | metadata |
| Movies and TV | 34,372 | 3,938 | 56,726 | ratings | reviews | metadata |
| Musical Instruments | 58,942 | 3,179 | 95,580 | ratings | reviews | metadata |
| Office Products | 25,861 | 2,869 | 29,522 | ratings | reviews | metadata |
| Sports and Outdoors | 66,569 | 3,301 | 75,577 | ratings | reviews | metadata |
| Toys and Games | 46,132 | 2,230 | 53,330 | ratings | reviews | metadata |
| Overall | 992,366 | 99,376 | 1,966,788 |