And a program in Peru sends text messages to patients with H.I.V., reminding them to take their medicines.

VOA: special.2010.05.03

Many people use E-mail,blogs,text messages and social Web sites like Facebook to keep in touch with their friends.

VOA: special.2009.02.06

People could send a text message with the code and get a message back confirming that what they bought is listed in a database.

VOA: special.2010.03.01

When you buy a drug, you scratch the panel, you send a text message with the number that you see, and you get a response instantly at the counter if the drug is genuine or fake."

VOA: standard.2010.06.07