The 25th international information and communication technology and office automation, SIB IT-2011, opened on Tuesday in Tunis. The new five-day fair gathers 111 exhibitors operating in the sector of services, information technology equipment and accessories, e-solution, office automation, network and telecommunications, web solutions and marketing, industrial information technology, software and software package, security solutions and management of information technology network. According to the organisers' forecasts, 130,000 visitors are expected. An annual growth of 17% in the ICTs sector will be recorded. This rate will contribute by 13.5% to the GDP.