They are both used as a means of communication.
The American Telephone and Telegraph Company was created in 1885
The telephone was invented as an evolutionary setup from the telegraph, naturally Alexander Graham Bell wondered if there was a way to transfer his voice through interconnecting cables like the telegraph.
There was a vast network of Telegraph lines and telegraph offices before the telephone was popular. Before that people used postal services like the "Royal Mail"
The symbol for Nippon Telegraph and Telephone Corporation in the NYSE is: NTT.
Inventors throughout history evolved the telegraph into the telephone.
Welll.... the telegraph replaced the pony express then the telephone replaced the telegraph. and now a days texting has replaced the telephone.
Both use electricity and radio waves to communicate.
telegraph
Um, a telephone??
telegraph
The telegraph
A telegraph?