What is one example of a redefining market being diintermediated, and how have they been reintermediated?

A few examples from class are:the travel industry. people used to have travel agents who would book and plan trips for them, now there are e-businesses online like priceline.com, travelocity.com, and expedia.com.bookstores. there used to be bookstore to go to and buy books, now there are places online to buy books like amazon.music stores. there are very few places to go to and listen to music, people go online to places like, itunes, or padora in order to listen to music now.a few more examples: cd players, tape players, record players. these types of music devices have been eliminated and replaced by ipods, and mp3 players, there are also places to listen to music online like youtube, or itunes.over heads have been eliminated from most class rooms and replaced by computers with projectors.telephone booths, have been replaced with cell phones. there are a rare amount of telephone booths left.