First of all, the Internet. The Internet is a large collection of different networks that use certain common protocols and provide certain common services. In this section, they explain the history in detail, like how it started as a military project, and even talk about how users access the modern version through ISPs (Internet Service Providers). For our second example, the author is talking about third generation mobile phone networks, or 3G. Initially deployed in 2001, this system offers both digital voice and broadband digital data services. One of the advantages of this system is the mobility that comes from the ability of data to be transmitted from cell tower to