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Click to viewSo Microsoft buying Yahoo for $44.6 billion is a big deal. No, it's a massive deal. Before Microsoft's share price dropped, it was to be the second-largest tech deal made in the past decade after AOL/Time Warner. Even more impressive? Like the AOL deal, this is a merger you can explain to your mom. Most people have never heard of the big tech companies. Hell, I've never heard of some of them. SDL? JDS Uniphase? Veritas? Aspect Development? I have no idea what they do. But you don't need to be a household name to be worth billions. Here are the 15 biggest tech deals since 1998.

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(Numbers by Thomson Financial)