Úsaideann an suíomh gréasáin seo fianáin chun cinntiú go mbainfidh tú tairbhe ar fheabhas ónár suíomh gréasáin. Má chliceálann tú nó má ndéanann tú nascleanúint ar an suíomh, aontaíonn tú lenár mbailiúchán eolais trí na fianáin.
The telephone has become an essential tool of communication – from its invention in 1876 to the ever-connected mobile and conference calls we have today. This gallery tracks the development of telephones through time.
A doctor on the telephone (which is linked up to a television screen) to a patient whom he can both observe and talk to from a distance; representing possible technological innovations. Reproduction of a drawing after D.L....