8 great moments in Google I/O history

Get ready for 2014's Google I/O by looking back at some of the biggest moments and announcements from previous years.
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The greatest show on Google Earth

For those who follow Google or use its products, Google's annual developers' conference is perhaps the greatest show on Google Earth. New announcements compete with planned and unexpected theatrics for legendary status.

As we eagerly await the opening of Google I/O, let's look back at the most memorable moments and biggest reveals from past years.

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