Early wearable computer: Qing Dynasty abacus ring. pic.twitter.com/QNV5A3iXCb
— Eli Dourado (@elidourado) March 9, 2015
Here it is:
A little more here.
Early wearable computer: Qing Dynasty abacus ring. pic.twitter.com/QNV5A3iXCb
— Eli Dourado (@elidourado) March 9, 2015
Here it is:
A little more here.
http://www.abc.net.au/radionational/programs/bigideas/biography-of-a-coin/6261672