Small computer programmes for a mobile phone or a tablet!Four letters:​

Christopher Columbus. He was a red-haired guy of strong build and slightly above average height. From childhood he was intelligent, practical, very proud. He had a dream of travel and find the treasure of gold coins. And he has translated his dreams into reality. He found a treasure - a huge continent - America.

    Jacques-Yves Cousteau, the famous French oceanographer, Explorer and pioneer of underwater filming and research, the inventor of the aqualung and the author of many books. He chose the underwater world, giving all its secrets and beauty. His first dive was a gas mask and motorcycle Luggage. The first attempt to go under water in this device is almost cost him his life. But he invented playing with life to find a way to get to the underwater Kingdom.