Update: The USPTO has an extremely stupid web app that has sessions for idempotent requests. I've fixed some of the links (let's see if they still work in five minutes).

What do you think Perl is? What do you think the US Patent and Trademark Office thinks it is? No peeking until you decide which are Perl and which aren't:

• computer software for use in cross-platform software application, software component and website development
• Canned Meats
• dental whitening system
• Proteins produced by transgenic caterpillars
• bulk, booms and pillows
• Dating services and providing social introduction services
• a lightweight cementitious inorganic material with a water-impermeable outer jacket
• industrial adhesive used for aerospace fixtures
• processed volcanic silicates
• brainz

Give up? Search the USPTO for "perl'.

I won't spoil it for anyone, so I'll update this post in a couple of days.