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Portable cassette players were first made for home recordings but became popular for being able to share and play music in headphones instead of large speakers. -
A pager was used as a wireless telecommunications device that received and displayed voice messages, initially mainly used in hospitals later on became widely popular as a use of communication. -
A boombox was one of the first amplified sound speakers mainly used by hip-hop artists when trying to share their new and upcoming music. It came before most sound systems even the MP3 player. -
The Nintendo Entertainment System was a 8-bit gaming system that was one of the first games systems able to switch out game cartridges, expanding and effectively growing the gaming business exponentially. -
The Apple Macintosh was the first personal microcomputer made using a graphic user interface, it was very slow to commercialize at first but quickly took off soon after.