When you're teenagers, you don't quite know what to write on there. Little Os and Xs for kisses and things like that.

VOA: special.2010.02.08

For example, you can find the work of two brothers who go by the name Os Gemeos.

VOA: special.2009.04.08

The Google Chrome OS is expected to be available in the second half of next year.

VOA: special.2009.07.17

Art galleries all over the world have shown the artwork of Os Gemeos.

VOA: special.2009.04.08