What line of work are you in? <a href=\" http://www.cornwallfoodanddrink.co.uk/homework-help-geography/#hairpin \">online algebra</a> Brazil\'s biggest telecommunications companies include TIMParticipacoes, the Brazilian unit of Telecom Italia, Grupo Oi, Telefonica Brasil,and Claro, a unit of Mexican tycoon Carlos Slim\'s America Movil.