| Category | Users | Items | Ratings | |||
|---|---|---|---|---|---|---|
| Arts Crafts and Sewing | 14,219 | 837 | 17,256 | ratings | reviews | metadata |
| Automotive | 12,586 | 452 | 13,343 | ratings | reviews | metadata |
| Books | 46,424 | 19,353 | 69,170 | ratings | reviews | metadata |
| CDs and Vinyl | 0 | 0 | 0 | ratings | reviews | metadata |
| Cell Phones and Accessories | 103,877 | 2,350 | 155,519 | ratings | reviews | metadata |
| Digital Music | 1,461 | 45 | 1,492 | ratings | reviews | metadata |
| Electronics | 300,745 | 6,847 | 567,108 | ratings | reviews | metadata |
| Grocery and Gourmet Food | 5,434 | 302 | 5,762 | ratings | reviews | metadata |
| Home and Kitchen | 49,399 | 1,996 | 57,483 | ratings | reviews | metadata |
| Industrial and Scientific | 6,620 | 407 | 7,758 | ratings | reviews | metadata |
| Kindle Store | 0 | 0 | 0 | ratings | reviews | metadata |
| Movies and TV | 40,908 | 2,847 | 79,568 | ratings | reviews | metadata |
| Musical Instruments | 31,471 | 1,529 | 56,568 | ratings | reviews | metadata |
| Office Products | 27,739 | 1,016 | 37,996 | ratings | reviews | metadata |
| Sports and Outdoors | 39,400 | 1,913 | 45,416 | ratings | reviews | metadata |
| Toys and Games | 45,589 | 1,667 | 58,015 | ratings | reviews | metadata |
| Overall | 591,252 | 41,561 | 1,172,454 |