Information and Processing Technologies
Ackoff via Belinger, Castro, Mills at http://www.systems-thinking.org/dikw/dikw.htm

• Data - data is raw. It simply exists and has no significance beyond its existence (in and of itself). It can exist in any form, usable or not. It does not have meaning of itself.
• Knowledge - knowledge is the appropriate collection of information, such that it's intent is to be useful. Knowledge is a deterministic process. 
• Understanding - understanding is an interpolative and probabilistic process. It is cognitive and analytical. It is the process by which I can take knowledge and synthesize new knowledge from the previously held knowledge. 
• Wisdom - wisdom is an extrapolative and non-deterministic, non-probabilistic process. It beckons to give us understanding about which there has previously been no understanding, and in doing so, goes far beyond understanding itself.