Jay Steen
Chris MessinaWhat's YOUR favorite tech innovation?
sqncs@chrismessina social media since it has turned every problem and social interaction into sloganeering
Mr E McKissock@chrismessina
I know it's going back a few years, but perhaps the Archimedes screw.
Going more modern, external combustion engines are kind of special.
So hard to pick a favourite as technological innovation is so varied.
noodlejetski 
a Twitter poll by Adam Kotsko:
What's your favourite tech innovation?
1. illegal cab company (16%)
2. illegal hotel chain (12.2%)
3. fake money for criminals (38%)
4. plagiarism machine (33.9%)
the poll shows 37872 votes.