Overstock.com could soon be simply o.com if a new rule goes through this weekend, allowing for the first time since 1993 to register single-letter domains. Several single-letter domains were registered before engineers became worried the size of the database that manages all the domain names. Since then domains needed to be at least three characters.

Some think these single-letter domain names could bring in six-figures as companies vie for the simple domain names.

Matt Bentley, chief executive of domain name broker Sedo.com LLC, said single-letter “.com” names could fetch six-figure sums, and a few might even command more than $1 million from some of the Internet’s biggest companies. Yahoo Inc. applied for a trademark to “y.com” this year.