An SMS primer — With the mobile internet attracting more and more attention and use, it's getting very difficult for online businesses to ignore the world of mobile. SMS (Short Message Service) is the technology behind text messaging and even though it's far from being the most cutting-edge mobile technology, it's often the first one companies will experiment with because it's the most widely-used. Over 200 billion SMS messages were sent in 2007.... [Tags: cutting edge, mobile internet, mobile technology, short message service, sms messages]