| Category | Users | Items | Ratings | |||
|---|---|---|---|---|---|---|
| Arts Crafts and Sewing | 2,609 | 241 | 3,420 | ratings | reviews | metadata |
| Automotive | 779 | 143 | 857 | ratings | reviews | metadata |
| Books | 19,815 | 9,113 | 34,458 | ratings | reviews | metadata |
| CDs and Vinyl | 0 | 0 | 0 | ratings | reviews | metadata |
| Cell Phones and Accessories | 34,643 | 1,050 | 49,626 | ratings | reviews | metadata |
| Digital Music | 1,086 | 37 | 1,135 | ratings | reviews | metadata |
| Electronics | 117,559 | 4,008 | 174,125 | ratings | reviews | metadata |
| Grocery and Gourmet Food | 6,510 | 246 | 6,805 | ratings | reviews | metadata |
| Home and Kitchen | 7,115 | 645 | 7,450 | ratings | reviews | metadata |
| Industrial and Scientific | 1,717 | 201 | 1,940 | ratings | reviews | metadata |
| Kindle Store | 0 | 0 | 0 | ratings | reviews | metadata |
| Movies and TV | 53,824 | 3,038 | 109,050 | ratings | reviews | metadata |
| Musical Instruments | 17,992 | 1,217 | 27,355 | ratings | reviews | metadata |
| Office Products | 20,786 | 529 | 25,020 | ratings | reviews | metadata |
| Sports and Outdoors | 15,499 | 1,169 | 17,167 | ratings | reviews | metadata |
| Toys and Games | 6,799 | 954 | 7,338 | ratings | reviews | metadata |
| Overall | 277,570 | 22,591 | 465,746 |