we must hit a low price point. Disruptive technologies typically have a lower sticker price per unit than products that are used in the mainstream, even though their cost in use is often higher. What enabled the use of disk drives in desktop computers was not just their smaller size; it was their low unit price, which fit within the overall price points that personal computer makers needed to hit. The price per megabyte of the smaller disk drives was always higher than for the larger drives.