They help businesses keep track of products.

VOA: special.2010.09.01

Rosequist says it is also important to keep track of the survivors and where they go for medical treatment.

VOA: standard.2010.07.26

But some employers frown on workers taking time away from their jobs to follow the games and keep track of their brackets.

VOA: standard.2009.03.25

Henry says there is not only a need to keep track of the nuclear weapons in the world.

VOA: standard.2010.08.06

It's difficult to keep track of the slick, says co-pilot Brian Boland.

VOA: standard.2010.07.05

"We know that this is already happening in remote clinics, for example in Rwanda, where cell phone-based technologies are being used to keep track of dispensation of drugs to patients with HIV,"

VOA: standard.2010.02.24

"We really tried to keep narrative flows going so it didn't get too convoluted, because I lose track of that stuff."

VOA: standard.2010.05.19