Television has changed since the advent of digital technology in terms of its production, distribution and consumption. It has become a global, rather than a national industry and has become increasingly commercial, with public service broadcasting forced to adapt its structure, role and function. International co-production is growing and broadcasters such as HBO have achieved global success. Broadcasters are now "narrowcasters", with multiple channels targeting different (sometimes more niche) audiences. Audiences consume television texts in a variety of ways as the industry has increased portability via new platforms (tablet, mobile phone) and patterns of consumption have changed alongside this (the box-set and, binge-watching, on demand and, catch up, Netflix, Amazon etc.) Interactive social media channels such as youtube have increased accessibility for the "prosumer" audience, and social media and viral promotion have become a critical part of ma