| Category | Users | Items | Ratings | |||
|---|---|---|---|---|---|---|
| Arts Crafts and Sewing | 18,020 | 932 | 22,151 | ratings | reviews | metadata |
| Automotive | 18,473 | 527 | 19,684 | ratings | reviews | metadata |
| Books | 181,144 | 44,171 | 307,762 | ratings | reviews | metadata |
| CDs and Vinyl | 0 | 0 | 0 | ratings | reviews | metadata |
| Cell Phones and Accessories | 109,858 | 2,683 | 181,185 | ratings | reviews | metadata |
| Digital Music | 2,571 | 66 | 2,640 | ratings | reviews | metadata |
| Electronics | 345,784 | 7,539 | 560,184 | ratings | reviews | metadata |
| Grocery and Gourmet Food | 8,525 | 453 | 9,276 | ratings | reviews | metadata |
| Home and Kitchen | 56,089 | 2,239 | 64,458 | ratings | reviews | metadata |
| Industrial and Scientific | 8,769 | 482 | 10,032 | ratings | reviews | metadata |
| Kindle Store | 0 | 0 | 0 | ratings | reviews | metadata |
| Movies and TV | 246,671 | 4,371 | 462,985 | ratings | reviews | metadata |
| Musical Instruments | 20,900 | 1,514 | 31,706 | ratings | reviews | metadata |
| Office Products | 35,780 | 1,145 | 47,197 | ratings | reviews | metadata |
| Sports and Outdoors | 61,262 | 2,516 | 70,132 | ratings | reviews | metadata |
| Toys and Games | 43,465 | 1,888 | 49,120 | ratings | reviews | metadata |
| Overall | 997,555 | 70,526 | 1,838,512 |