| Category | Users | Items | Ratings | |||
|---|---|---|---|---|---|---|
| Arts Crafts and Sewing | 15,578 | 965 | 19,527 | ratings | reviews | metadata |
| Automotive | 6,430 | 458 | 6,752 | ratings | reviews | metadata |
| Books | 54,279 | 25,769 | 94,719 | ratings | reviews | metadata |
| CDs and Vinyl | 0 | 0 | 0 | ratings | reviews | metadata |
| Cell Phones and Accessories | 77,536 | 2,346 | 115,329 | ratings | reviews | metadata |
| Digital Music | 1,423 | 55 | 1,478 | ratings | reviews | metadata |
| Electronics | 230,745 | 6,078 | 389,762 | ratings | reviews | metadata |
| Grocery and Gourmet Food | 0 | 0 | 0 | ratings | reviews | metadata |
| Home and Kitchen | 36,836 | 1,995 | 42,755 | ratings | reviews | metadata |
| Industrial and Scientific | 5,861 | 424 | 6,192 | ratings | reviews | metadata |
| Kindle Store | 0 | 0 | 0 | ratings | reviews | metadata |
| Movies and TV | 66,863 | 3,888 | 134,333 | ratings | reviews | metadata |
| Musical Instruments | 19,211 | 1,484 | 34,892 | ratings | reviews | metadata |
| Office Products | 25,336 | 1,102 | 33,348 | ratings | reviews | metadata |
| Sports and Outdoors | 26,496 | 1,932 | 29,385 | ratings | reviews | metadata |
| Toys and Games | 23,373 | 2,177 | 27,510 | ratings | reviews | metadata |
| Overall | 502,014 | 48,673 | 935,982 |