[link|http://www.google.com/search?q=Practical+Extraction+and+Reporting+Language&sourceid=mozilla-search&start=0&start=0&ie=utf-8&oe=utf-8&client=firefox&rls=org.mozilla:en-US:unofficial|http://www.google.co...:en-US:unofficial]

Of course, it mentions (first entry) that:
"Perl was originally said to stand for "Practical Extraction and Reporting Language" but that name is no longer used. Larry Wall prefers the usage of an upper-case "Perl" for the language itself and lower-case "perl" for any interpreter or compiler of Perl."