MP3 player was a life changer. I went from a huge CD players not being able to fit in my pocket to a tiny bean that connects to pc with hundreds of songs, and i was blow away!

  • Since I’m an old greybeard - BBS’s. It blew my young mind that you could connect your computer to another one and communicate with people.

    Email is a close second for the same reason - pre-WWW I should point out haha!