Did I mention I love TextExpander? Yeah.. so, to make a long story short: clients ask me questions about their computers, upgrades, lifespans, etc. I don’t normally remember all the details of their Macs so I get them to send me the Serial Number (Open the Apple menu, click About This Mac and it should be right there.)
Once you have it you can go by Apple’s support site and look it up… but that takes too long.
Make a new TextExpander snippet with Applescript as the content type:
property theURL : ""
set theURL to "http://support.apple.com/specs/#" & (the clipboard)
do shell script "open " & theURL
Then you just copy the serial number, and anywhere you can type use !specs to invoke it and up pops open Apple spec page a few seconds later.