Information Hierarchy (Larson, 1988):

What is data?  Data is information without an underlying
structure of associative relationships.  Many computer processes
convert information into data.  Data is the lowest form of
information, and generally refers to any set of measurements,
facts, or figures, regardless of whether or not they have been
acquired with a certain purpose in mind.  Data becomes
information after it has been retrieved and processed for a
particular purpose.

What is information?  Information is an ordering of data fields. 
It is an aggregate of facts so organized that it can subsequently
be selectively tailored or structured in response to a particular
context so as to become knowledge.  Information is meaningful
data, whereas data as such has no intrinsic meaning or
significance. 

What is knowledge?  Knowledge is information with structured
relationships. It is information that clarifies or shifts a
perspective, resulting in an understanding, awareness, or concept
of how components fit together.  Most computing applications
serve to automatically and rapidly process data, rather than
extend thought processes and broaden the knowledge base.  The
paradox of the Information Age is that it has society drowning in
data, without providing much knowledge. 

What is wisdom?  Wisdom implies a useful application of
knowledge. 

<cfile11>   Information Organization
<cfile13>   Information Systems
<cfile15>   Information Structure
<cfile34>   Three Principles of Good Hypertext