What is the fine-grained topic of the following text: Mr. Lowy sits as Co-Chairman of the Interactive Advertising Bureau’s (IAB) Advanced TV Advisory Committee, and he is a member of the IAB’s Board of Directors for the Video Center of Excellence, a member of Freewheel’s Council for Premium Video, as well as a Digital committee member for the National Association of Broadcasters. Only return the topic.
Mr. Lowy's roles in various advertising and broadcasting organizations.