It has been fascinating to observe the rising adoption rates of netbooks. Think of netbooks as filling the technological niche between smartphones (such as the Blackberry and the iPhone) and full-sized laptops: they are compact, light-weight, and inexpensive computers for the price-conscious mobile user. Netbooks generally feature a diagonal screen size of 7–10 inches, wi-fi, a slower processor which consumes less power (resulting in often considerably longer battery life), a smallish hard drive, and no built-in optical drive (CD/DVD).