Over the last decade, mobile telephones have gone from being a rarity in most countries, to being carried by the vast majority of human beings. Now, according to new research, smartphone (which is actually a misnomer – it is actually a Very Personal Computer) sales will top a billion units a year by 2015 as the smartphone's share of phone shipments rockets from 15.8% in 2009, to 32.5% this year to 54.4% in 2015). Planet Earth only has 6.75 billion human inhabitants. If this trend continues, by the turn of the decade, the vast majority of human beings will be carrying a networked personal computer on their person at all times. We are undoubtedly living through a period of unprecedented change in human history.
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