telephone
telegraph
booty
booty
The twentyfirst century.because if its 2011 it would skip 100 years and it would be the twentyfirst century.
Nineteenth
Communication by mail.
Nineteenth
No, the television was developed and introduced to the commercial market in the 1940s and 1950s, about halfway into the twentieth century.
Morse's telegraph
Modern set theory was developed by Georg Cantor and Richard Dedekind in the late nineteenth century.
ROBIN ATTFIELD has written: 'ENVIRONMENTAL ETHICS: AN OVERVIEW FOR THE TWENTYFIRST CENTURY'
'Why is Holocaust research still important in the twentyfirst century?'