The cassette tape was intended to be a smaller, more convenient way to record dictation. After a few improvements though, it was found that the audio quality was better than that of a vinyl record. In the 1980’s, Sony invented the Sony Walkman. The walk-man made it possible for you to take your music with you, anywhere you went. Also around this time, cars started to be made with tape decks instead of the standard 8 track players. . The simple fact that the tape was smaller and more portable, made it more favorable then the record and 8-track.
The cassette tape had multiple uses. It wasn’t just a way to listen to music. Answering machines were equipped with smaller cassette tapes so that you could listen to phone messages. You could record conversations on a blank cassette by using a handheld recorder. Literally anything you could hear could be recorded.
As of 2007 , cassette tapes were still being used in some degree. They were being used for audio books for the blind, court recordings and religious messages. It was estimated that Lenco-PMC Inc. (the last cassette making company in the United States) would produce around 22 million cassettes over the following few years. 
 The History of the Cassette Tape , Dennis Hartman, http://www.ehow.com/about_5071119_history-cassette-tape.html (accessed March 28, 2011)
 Cassettes linger long after expected demise, USA TODAY. com http://www.usatoday.com/tech/products/2007-08-05-cassettes_N.htm (accessed March 30, 2011)