I agree with the basic premise, that obsolete data & information, digital and physical, should be destroyed.
That list of data to be destroyed is very interesting, but I would have appreciated a link to a document that describes their reasons for each type. Many are "obvious", but some I'd like to see specific reasons. ie maps & blueprints?
marketing plans?
advertising?
specification drawings? ...

Several of the links go to a generic link page that does not relate to the putative topic, ie the link from the word "enron" and "purdue university" don't link to anything apparently related?

I had a very large data destruction project that was well beyond my tech dept. I used the services of Liquid Technology and got amazing results. Everything discussed in this article is on point with what they do. Security, data erasure, etc was handled completely and professionally.

The amount of sensitive material I needed to dispose of was massive and the last thing I needed was something being missed and getting in the wrong hands.

I hope other CIOs read your article before they decide to take on their own project!

Thanks again!