Data is everywhere, today. We cannot imagine a world without bar graphs or pie charts anymore -- they have become integral to presenting information. From billion-dollar companies to small ...

In 1854, Sir Charles Wheatstone invented the cipher known as "Playfair," named for his friend Lyon Playfair, first Baron Playfair of St. Andrews, who popularized and promoted the cipher.

Playfair Mining Ltd., an exploration stage company, engages in the acquisition, exploration, and development of mineral properties. It explores for copper, zinc, and nickel. The company holds a ...

Playfair Mining Ltd., an exploration stage company, engages in the acquisition, exploration, and development of mineral properties. It explores for copper, zinc, and nickel. The company holds a ...

Playfair Mining Ltd., an exploration stage company, engages in the acquisition, exploration, and development of natural resource properties in Norway. It explores for copper, zinc, tungsten ...

The Double Playfair is an extension of the Playfair to use two separate keys and to encipher each pair of letters twice. The German police made the mistake in late 1941 of switching from the ...