"Vendor lock-in" is an interesting concept. Many people would love to leave Facebook, but can't because they don't want to miss events.
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Nah, Xerox is to Photocopiers as Excel is to Spreadsheets. It was different as the others in the list were generic names.
Thanks. Twitter will use this to make your timeline better. UndoUndo
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building
MS Office's is Excel
Your bank's is your mortgage 