| Category | Users | Items | Ratings | |||
|---|---|---|---|---|---|---|
| Arts Crafts and Sewing | 8,407 | 931 | 11,315 | ratings | reviews | metadata |
| Automotive | 8,931 | 1,812 | 11,596 | ratings | reviews | metadata |
| Books | 40,606 | 13,054 | 59,519 | ratings | reviews | metadata |
| CDs and Vinyl | 0 | 0 | 0 | ratings | reviews | metadata |
| Cell Phones and Accessories | 15,588 | 1,767 | 22,313 | ratings | reviews | metadata |
| Digital Music | 59 | 16 | 60 | ratings | reviews | metadata |
| Electronics | 100,541 | 8,507 | 169,191 | ratings | reviews | metadata |
| Grocery and Gourmet Food | 479 | 113 | 493 | ratings | reviews | metadata |
| Home and Kitchen | 55,421 | 5,177 | 79,428 | ratings | reviews | metadata |
| Industrial and Scientific | 4,975 | 791 | 5,654 | ratings | reviews | metadata |
| Kindle Store | 0 | 0 | 0 | ratings | reviews | metadata |
| Movies and TV | 6,880 | 1,968 | 9,937 | ratings | reviews | metadata |
| Musical Instruments | 14,322 | 1,779 | 23,483 | ratings | reviews | metadata |
| Office Products | 17,936 | 1,817 | 23,249 | ratings | reviews | metadata |
| Sports and Outdoors | 35,992 | 3,430 | 44,991 | ratings | reviews | metadata |
| Toys and Games | 18,489 | 1,933 | 22,431 | ratings | reviews | metadata |
| Overall | 249,229 | 43,095 | 483,660 |