From
ResourceShelf Personal Computers-- Statistics
Source: Computer Industry Almanac
PCs In-Use Surpassed 820M in 2004; PCs In-Use Will Top 1B in 2005
"The worldwide number of PCs in-use surpassed 820 million in 2004 and is projected to top 1 billion in 2007. PCs in-use growth is slowing as the industrialized world is approaching the top of the S-curve. Strong PC growth will continue in the developing countries for another decade. The U.S. has a large lead with over 220M PCs in-use--over 3X the number in Japan. The U.S. accounts for over 27% of all PCs in-use compared to 4.6% of worldwide population. PC usage is growing rapidly in China, which is expected to surpass Japan in 2007. PC usage is also growing strongly in many populous countries such as Brazil, India and Russia."
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