| Category | Users | Items | Ratings | |||
|---|---|---|---|---|---|---|
| Arts Crafts and Sewing | 70,819 | 1,748 | 92,225 | ratings | reviews | metadata |
| Automotive | 35,291 | 1,116 | 39,164 | ratings | reviews | metadata |
| Books | 1,334,231 | 71,712 | 3,080,696 | ratings | reviews | metadata |
| CDs and Vinyl | 0 | 0 | 0 | ratings | reviews | metadata |
| Cell Phones and Accessories | 212,390 | 4,098 | 336,506 | ratings | reviews | metadata |
| Digital Music | 6,584 | 74 | 6,714 | ratings | reviews | metadata |
| Electronics | 545,452 | 10,329 | 860,575 | ratings | reviews | metadata |
| Grocery and Gourmet Food | 25,124 | 1,024 | 27,950 | ratings | reviews | metadata |
| Home and Kitchen | 154,489 | 3,956 | 179,065 | ratings | reviews | metadata |
| Industrial and Scientific | 31,354 | 967 | 34,655 | ratings | reviews | metadata |
| Kindle Store | 0 | 0 | 0 | ratings | reviews | metadata |
| Movies and TV | 418,501 | 5,324 | 804,276 | ratings | reviews | metadata |
| Musical Instruments | 77,274 | 2,296 | 221,366 | ratings | reviews | metadata |
| Office Products | 100,896 | 2,162 | 142,086 | ratings | reviews | metadata |
| Sports and Outdoors | 92,848 | 2,664 | 102,373 | ratings | reviews | metadata |
| Toys and Games | 1,063 | 33 | 1,065 | ratings | reviews | metadata |
| Overall | 2,498,812 | 107,503 | 5,928,716 |