I was just thinking about this: fundamentally, what is the difference between a spreadsheet file with many sheets (technically, isn't it a relational database?) and an SQL DB?There has to be ...

File-oriented and transaction-oriented storage systems use digital technology, including computers and local area networks, to store information for businesses across the country.

File versioning is strictly restricted to just files, and usually refers to individual files, not a bunch of files that make up a system. The files don't necessarily have to be related to each other.