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Nice and brief WarDick!
May I add...wiki's have a special and easy way of creating links, which blogs lack. Though, having written this, many systems have started to "copy" this "feature" of wiki's.
The keyword is
CamelCase, used to create links on the fly, without having to specify the actuall link (just indicating the page, using its name).
With software it is kind of like....hmmm, let's take my favorite example:
the hammerBasicly the hammer can be employed in a variety of situations, which can actually not be clearly defined, as their usage capacity exceeds the imagination.
Now we do have special names for hammers, which are suppose to be used in special circumstances. For example we have a mallet, sometimes also refered to as "soft face hammer".
We're am I going with this? Your hammer in software is a CMS. Your blog/wiki is a mallet, ball-pain, etc...
A blog is an online dictionary.
A wiki is an online notebook.
Hope you find WarDicks and my explanations to have sheed some light, into the thicket of IT marketing terminology.