Complex sentence: In 2009, a company called nTag, which was then acquired by Alliance Technology used nTag technology which allows for users to even be notified who to talk to and it's able to exchange business cards electronically.
Split into simpler sentences: In 2009, a company called nTag which was then acquired by Alliance Technology. They used nTag technology which allows for users to even be notified who to talk to and it's able to exchange business cards electronically.