The small and medium businesses (SMB) segment is still largely unaddressed by the domestic IT companies, Tata Consultancy Services (TCS) vice chairman S Ramadorai has said.“SMB market is largely unaddressed, which accounts for 50-60 per cent of the potential market in India,” Ramadoria said addressing the annual business conclave ‘Manfest 2010’ of the Indian Institute of Management, Lucknow here recently. Speaking on ‘’The role of the Indian IT industry in a recessionary economy and its future potential’, he said education, retail and healthcare were also relatively unexplored by the IT companies.