Portable music playing devices are incredibly popular and common in todays society. Smartphones have allowed us to take music with us wherever we go but there once was a time when this was not possible. Portable audio cassette/tape players were first introduced in the late 70s when cassette tapes where popular. When you think of a portable cassette player, you undoubtably think of the Sony Walkman cassette player. The first walkman was introduced in 1979 (TPS-L2). Following Sony’s lead Aiwa, Panasonic and Toshiba also came out with competing models in the 80s. Over the years, the Sony Walkman cassette player evolved with new features like AM/FM receivers, bass boost, auto-reverse, solar power, dual cassette drive and even a water proof model. But like every technology, it wasn’t going to last forever. Cassette tapes began to become a thing of the past when the CD was invented in 1982, 2 years later the portable CD player was released.