| Category | Users | Items | Ratings | |||
|---|---|---|---|---|---|---|
| Arts Crafts and Sewing | 926,396 | 4,033 | 1,268,799 | ratings | reviews | metadata |
| Automotive | 488,505 | 9,612 | 626,623 | ratings | reviews | metadata |
| Books | 4,263,523 | 84,656 | 9,053,776 | ratings | reviews | metadata |
| CDs and Vinyl | 0 | 0 | 0 | ratings | reviews | metadata |
| Cell Phones and Accessories | 1,729,530 | 23,046 | 2,424,733 | ratings | reviews | metadata |
| Digital Music | 15,051 | 113 | 15,601 | ratings | reviews | metadata |
| Electronics | 2,784,128 | 35,943 | 4,164,363 | ratings | reviews | metadata |
| Grocery and Gourmet Food | 500,571 | 6,922 | 620,384 | ratings | reviews | metadata |
| Home and Kitchen | 1,394,861 | 17,687 | 1,687,112 | ratings | reviews | metadata |
| Industrial and Scientific | 988,205 | 6,142 | 1,272,888 | ratings | reviews | metadata |
| Kindle Store | 0 | 0 | 0 | ratings | reviews | metadata |
| Movies and TV | 13,994 | 1,104 | 15,694 | ratings | reviews | metadata |
| Musical Instruments | 237,430 | 4,653 | 316,033 | ratings | reviews | metadata |
| Office Products | 1,922,775 | 7,776 | 2,685,368 | ratings | reviews | metadata |
| Sports and Outdoors | 1,059,350 | 11,140 | 1,276,541 | ratings | reviews | metadata |
| Toys and Games | 147,060 | 5,950 | 163,118 | ratings | reviews | metadata |
| Overall | 11,539,171 | 218,777 | 25,591,033 |