The main difference is where the values are stored. A SAS data file is a type of SAS data set that contains both descriptor information about the data and the data values themselves. SAS data views ...

Already know the difference? Carry on. But if you don't, here's your chance to become a smarter Windows user in short order.

Then there is Archivas (recently acquired by Hitachi Data Systems) and Caringo. Q: What accounts for the difference in yield between compression and file deduplication?

The independence of information throughout a file-oriented storage system makes it difficult for a business to group data sharing common characteristics and streamline data files.

I could easily see the differences between two versions of the same HTML file, and merge them any way I wanted to. Beyond Compare also has a feature for finding differences between image files.