of attendees from around the world gather to hear a collection of experts speak on Social Media, Mobile and Cross-Platform issues. Measurement companies In most countries the advertising industry, via its peak industry associations, endorses a single media research company as the official provider of audience measurement. The methodology used by the official provider then becomes known as the industry currency'' in audience measurement. Industry members fund the audience research and share the findings. In a few countries, where the industry is more fragmented or where there is no clear peak industry association, two or more competing organisations may provide audience measurement services. In such countries, there is said to be no industry currency. Four basic methods of data collection are used to survey broadcast audiences, namely interviews, diaries, meters or scanning and modelling. Research companies employ different methodologies depending on where and when media is used and the cost of data collection. All these methods involve sampling – that is taking a representative sample of the population and recording their media usage which is then extrapolated to the general population. The Kantar Media network (including TNS) currently measures TV, radio, and internet audiences in over 40 countries. Nielsen Media Research is also very active in the provision of radio survey data globally, collecting TV audience measures in 27 countries, people meter technology in more than 58,000 homes. GfK, a global market research company, provides similar Media Measurement services in Europe and other parts of the world. In Australia, television ratings are collected by three main organizations. OzTAM serves metropolitan areas, Regional TAM serves regional areas serviced by three commercial networks. Ratings are collected year round, but findings are not made public for a period of around 10 weeks over summer which allows the networks to experiment with schedules. Radio surveys are carried out by Nielsen Media Research Australia. In Israel, MBER provide Radio and TV measurement rating. In Argentina, radio and television measurement is done by Ibope and Infortecnica. In Armenia, television ratings are collected by Admosphere-Armenia CJSC. In Austria the measurement is done by GfK at the request of Verein Arbeitsgemeinschaft TELETEST (AGTT). In Belgium TV and radio measurements are handled by GfK at the request of Centrum voor Informatie over de Media (CIM). In Bosnia and Herzegovina, Mareco Index Bosnia is the provider of TAM ratings (TV Meters). This company also provides Radio & Print Measurement data