Tens of thousands of Bangladeshis work in outsourcing firms and the industry generates billions of dollars in revenue every year, but executives fear the internet shutdown imposed as authorities sought to quell anti-government protests threatens its entire existence. With its vast reserves of English speakers and lower wages, South Asia has long been a favoured destination for developed-country firms looking to secure support services. The industry, known as business process outsourcing (BPO) provides international clients with live voice and text chat, back office support, email support, invoicing, online store management, image processing and more. IMAGES AND SOUNDBITES