The researchers tested their desalination process on a computer chip the size of a postage stamp.

VOA: special.2010.04.05

There was public demand to put the image on a postal stamp.

VOA: special.2010.05.31

"It is in a white envelope with a red stamp," Germont said.

VOA: special.2009.12.26

"This letter had a large green stamp on it.

VOA: special.2009.12.26

The device is the size of a postage stamp.

VOA: special.2011.05.25

But while Specter supports Obama's economic initiatives, he made clear he would not be a rubber stamp for Democrats.

VOA: standard.2009.04.28