Explanation:
MP3 = a computer file that contains music, typically a song
online bulletin boards = websites that allow people with common interests to have discussions among a number of people about a topic of choice
package switching = gathering data into little "packets" so it can be sent from computer to computer
search engine = a site at which users can search the entire Internet for keywords
social networking = online communities of people who share common interests or activities
the Internet = a communication technology that allows users to share large quantities of digital information, which includes text, video, and audio information
Usenet = a group of listservs that began in the late 1970s that allow people to discuss topics of interest (like pop culture, politics, or sports).
