Holy cow, I wrote a book!
Most people know that
Windows 95 was code-named Chicago.
The subprojects of Windows 95 also had their code names,
in part because
code names are cool,
and in part because these projects were already under way
by the time somebody decided to combine them into one giant project.
Even when they were separate projects, the first three teams worked
closely together, so the names followed a pattern of ferocious cats.
My guess is that
when the user interface team chose their code name, they heard that
the other guys were naming themselves after cats,
so they picked a cat, too.
I don't know whether they did that on purpose or by accident,
but the cat they picked was not ferocious at all.
Instead, they picked
a cartoon cat.
When the feature to
show a special message after Windows had shut down
was first added,
the shutdown bitmap was a screen shot of
Ren and Stimpy saying good-bye.
we remembered to replace them before shipping.
If you were paying attention:
You would have noticed that
code names get reused a lot,
not because of any connection between the projects
but purely by coincidence.