what is this book mentioned above?
It is a small, lightweight, legacy-free, and inexpensive laptop computer.
Netbook
A netbook belongs to a class of small, lightweight, legacy-free, and inexpensive laptop computers introduced in 2007. 
when did the macbook pro 13 come out 2006 what is this pro? It is the higher-end model of the MacBook family, sitting above the consumer-focused MacBook Air. how reliable is its keyboard? A report by AppleInsider has claimed that the updated butterfly keyboard fails twice as often as previous models, often due to particles stuck beneath the keys. how was the latter mentioned model received? It received mixed reviews which praised its portability, but criticized the compromises made in terms of features. how was its style and upgradation? Its components are officially non-user-replaceable, third parties do sell upgrade kits for the SSDs. what are some problems it encountered? Due to a more mature manufacturing process, the CPUs in its second-generation performs better under load, as the first generation chips ran hotter. what kind of laptop is it known as? UNANSWERABLE what is its comparisons with other devices? The 11-inch MacBook Air carried the desirable essential attributes of a netbook, but without the drawbacks of a slower processor and less capable operating system, albeit at a higher price.
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Netbook [SEP] Introduction
A netbook belongs to a class of small, lightweight, legacy-free, and inexpensive laptop computers introduced in 2007. Netbooks compete in the same market segment as mobiles and Chromebooks (a variation on the portable network computer). At their inception in late 2007 as smaller-than-typical notebooks optimized for low weight and low cost—notebook designs began appearing with the omission of certain features (e.g., the optical drive), featuring smaller screens and keyboards, and a reduction of computing power when compared to a full-sized laptop. Over the course of their evolution, netbooks have ranged in size from below 5" screen diagonal to 12". A typical weight is ().