The Q4 update to the US online retail sales forecast maintained its sales projections. Computers, software, music, books and videos will see the slowest online growth over the next five years. The fastest online category growth will come from pets, garden supplies, art, consumer electronics, and sports equipment. The most popular categories bought online will are clothing, consumer electronics and computers. This forecast details growth across 31 product categories, with historical data going back to 1998; it also calculates the share of online retail sales for each product category.