You have to love the IT industry – it really does conceive the best
new terms, acronyms and buzzwords. “Dark data” sounds like something
Ridley Scott came up with for the Prometheus sequel.
Whilst there are a variety of definitions for the term, they are all very similar. My suggested meaning is – retained data or information that is not being used or accessed for current business activities, and whose contents is not well known or structured in a readily accessible manner.
This most likely sounds like a verbose way of saying “old, retained information.” The interesting thing about dark data is that in fact at its simplest, it literally is “old, retained information.”