| Category | Users | Items | Ratings | |||
|---|---|---|---|---|---|---|
| Arts Crafts and Sewing | 1,048 | 480 | 1,211 | ratings | reviews | metadata |
| Automotive | 304 | 186 | 332 | ratings | reviews | metadata |
| Books | 68,367 | 33,893 | 187,161 | ratings | reviews | metadata |
| CDs and Vinyl | 0 | 0 | 0 | ratings | reviews | metadata |
| Cell Phones and Accessories | 1,145 | 347 | 1,341 | ratings | reviews | metadata |
| Digital Music | 17 | 13 | 19 | ratings | reviews | metadata |
| Electronics | 9,248 | 2,390 | 11,539 | ratings | reviews | metadata |
| Grocery and Gourmet Food | 107 | 55 | 108 | ratings | reviews | metadata |
| Home and Kitchen | 3,371 | 1,514 | 4,010 | ratings | reviews | metadata |
| Industrial and Scientific | 374 | 155 | 539 | ratings | reviews | metadata |
| Kindle Store | 0 | 0 | 0 | ratings | reviews | metadata |
| Movies and TV | 1,152 | 1,260 | 1,939 | ratings | reviews | metadata |
| Musical Instruments | 814 | 318 | 1,172 | ratings | reviews | metadata |
| Office Products | 836 | 345 | 942 | ratings | reviews | metadata |
| Sports and Outdoors | 1,769 | 776 | 1,920 | ratings | reviews | metadata |
| Toys and Games | 822 | 362 | 853 | ratings | reviews | metadata |
| Overall | 86,975 | 42,094 | 213,086 |