Several people wrote to correct my inexact terminology in talking about URLs pointing at files available on the nets via FTP (and, at times in the future, Gopher or the World-Wide Web). URLs are not part of the HyperText Markup Language (HTML) as such, although they are somewhat related, given their joint usage on the World-Wide Web.
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Quick Look Shortcut in Expose on Snow Leopard
In Expose mode in Snow Leopard, hover your mouse pointer over a window and press the Space bar to view a larger Quick Look version of that window.