Digital Revolution: The Greatest Inventions of Our Time

When I think of all of the technology that we have available to us, and use almost every day, it reminds me of how quickly we have evolved as a species.  I often times joke about my age , and speak of the old, antiquated devices that I used when I was your age.  I had a Sony Walkman that played cassette tapes.  Nowadays, you all have iPods or MP3 players of some sort.  I had a one-way pager (and felt like I was crazy important), while most of you all now have cellphones - smartphones at that.  I used snail mail… You all have email.  We had a VCR in my family, and were one of the first families to have one.  We used to rent our VHS tapes from Blockbuster Video.  I'd bet many of you do not even know what a VHS tape is (much less a Beta Max), as most of you probably have BlueRay players and Netflix.  I can remember vividly the day my dad brought home our very first VCR,  our very first microwave, and our very first television that didn't have big knobs on it and actually transmitted in color.  I can remember when I was excited to use our first remote control, even though it had a wire connecting it to our VCR, and only extended three feet beyond it.
 
That's it.  Enough dating myself.  While all of those inventions changed my life in major ways, I want to know what YOU all consider to be the greatest invention of the Digital Revolution.  What invention do you feel is the greatest contribution to modern society and why?  When was it invented?  How has it changed life for Americans?  How has it changed your life specifically?  How has its technology spawned (or MAY potentially spawn) even newer technologies?  Let me know your thoughts.