Poll People, selected to be a valid statistical sample, are inquired, typically by telephone. Accuracy also depends on the poll rate and on the reliability of the given answers. This technique would also allow an approval rating. First version after conversion of P/META into XML Valid People Meter Households, selected to be a valid statistical sample, are provided with electronic devices (it could be one for each member) which have the special purpose of recording the data almost automatically. This technique allows the data to be quite accurate in time. First version after conversion of P/META into XML Valid People Counter The people (or the households) who enjoy the material are counted one by one. This technique, similar to counting the number of sold tickets, can be easily used when the publication is achieved on "pay per view" or "video on demand" services. First version after conversion of P/META into XML Valid