Tech Tree is reporting there are (estimated) over one billion PCs installed around the globe. The Gartner Group called them ‘installed’ PCs as their estimation is for personal computers in use – not just shipped ones or machines sold. They factor in not only new machines, but second hand PCs as well. That’s over 1,000,000,000 PCs in use folks! The growth rate of installed base PCs is estimated to grow roughly 12% each year as more and more countries develop. They’ve also figured in “churning” and figure some 16% of installed machines will be replace this year alone. If you’re planning on being a part of that 16% who replaces an older PC, there are many donation and recycling options available for your old hardware.