UMTS is an acronym that stands for Universal Mobile Telecommunications System, a transmission technology that allows for a higher transmission rate than GSM and also provides access to the Internet. Data transmission with UMTS was a widely used standard for 3G mobile networks.

The usage base is a data filter in the TV Scope that makes it possible to filter certain usage data as the evaluation basis for counts, thereby changing total TV.

The usage share is a fact that indicates the share of the total usage volume represented by the usage volume in an output cell of a cumulation step in the evaluation.

USB is an acronym that stands for Universal Serial Bus. It refers to a standard for the connection of external devices such as hard drives or USB sticks to computers and modern TV sets.

Users are a segment of persons who are differentiated from the reporting base for whom the viewing time of a programme is greater than 0. In this case, no minimum use condition must be met.

User-centric measurement is an approach used for measuring online reach values. The measurement refers to the user communities of a website. It is performed through the use of cookies, for example.