Having written about sms.ac as well as .la, .fm etc, I get a number of hits from people looking for more information (what is .ac domain name, where is .la domain name from etc).

A country code top-level domain (ccTLD) is a top-level domain used and reserved for a country or a dependent territory. These are two letters long, and most of them correspond to the ISO 3166-1 standard for country codes.

.ac is for Ascension Island, .fm is for Federated States of Micronesia and so on. The full list can be found at Wikipedia's List of TLDs.

• What's the difference between different HDMI cables? - Feb 27, 2007
• What's the difference between the left and right on a headphone? - Jan 11, 2007
• Earbuds for sport - Jan 11, 2007
• Spencer Tunick - Apr 04, 2006
• How to set up the Linksys WAG54G as a wi-fi router only - Jan 05, 2006
• See more related posts in: Answerblog , Internet Culture