The juxtaposition of the words economy and digital fact refers to an 'economy of numbers. This mathematical vision which is more restrictive than the notion of 'computer economy' seems to prioritize the numbers on the other types of information. Often the term digital economy returns in a reductive way to e-commerce leaving aside other components such as services, infrastructure and the underlying technology. More specifically, the term should refer to telecommunications, audiovisual, software, computer networks, computer services, services and content online. According to GfK, the digital market brings together information technology (computers, phones, players, GPS...) and communication (social networks, online... sales) services and would be 681 billion in 2009. Digital brings together the Technologies of Information and Communication as well as all the techniques used in the processing and the transmission of information such as for example telecommunications, internet and information technology. The digital sector means the sector of economic activity on the Technologies of Information and Communication and the production and sale of digital products and services.