| Modern maritime IT builds on these foundations from line and radiotelegraphy and the encrypting techniques associated with it. |
| At central level, there was an improvement in the monitoring system of immunization coverage through radiotelegraphy. |
| During the first years, the company's efforts were devoted chiefly to showing the full possibilities of radiotelegraphy. |
| While teaching, Thompson contributed to the development of electric dynamo machines and radiotelegraphy. |
| Inauguration of the first branch of the imperial radiotelegraphy network, with the service between England and Canada. |
| Transmission apparatus for radiotelephony, radiotelegraphy, radio broadcasting and television. |
