The last few years have seen the emergence of two parallel trends: the first of such trends is set by technologies such as Near Field Communication, 2D Bar codes and RFID that support the association of digital information with virtually every object. Using these technologies ordinary objects such as coffee mugs or advertisement posters provide digital information that can be easily processed. The second trend is set by (semantic) Web services that provide a way to invoke automatically functionalities across the Internet lowering interoperability barriers. The PERCI system, discussed in the paper, provides a way to bridge between these two technologies allowing the invocation of Web services using the information gathered from the tags effectively transforming every object in a service proxy. KEYWORDS Human-Machine Systems, Web Technologies, Mobile Technologies, Semantic Data Model