Spotlight can be used for navigation on OSX by pressing Cmd + space to invoke it, which will instantly return somewhat relevant search results from the computer's index including calendar entries, image metadata, pdf contents, and more. It can also be used as an application launcher, making the dock redundant, though some argue that third-party tools like Quicksilver perform this function even better.

1. OSX Spotlight as navigation
Tuesday, February 24, 2009

2. I generally prefer keyboard over mouse
Tuesday, February 24, 2009

3. Key combination Cmd + space invokes spotlight
Tuesday, February 24, 2009

4. Index instantly returns
hits (somewhat)
relevant to term
Tuesday, February 24, 2009

5. Even includes calendar
entries and image
metadata and
pdf contents
Tuesday, February 24, 2009

6. Used as application
launcher, makes
dock redundant
Tuesday, February 24, 2009

7. and then some
Tuesday, February 24, 2009

8. (Quicksilver does this even better)
Tuesday, February 24, 2009