Traveling abroad is one of the most exciting adventures you can take. Whether you have been planning your trip for years or this is a last minute voyage, it is important that you prepare as much as possible before you head overseas. You may already have a long list of things to do before your flight ...
communication
Uses of Two-Way Radios
Nowadays, people mostly use phones and the internet to communicate wirelessly. In the early 1900's, radio equipment was the one used by people to exchange messages. Two-way telegraphy traffic was already commercially available across the Atlantic Ocean in 1907 and in 1923, the first mobile two-way ...