The Peace symbol was designed by Gerald Holtom, a British designer, in 1958 for the Campaign for Nuclear Disarmament. Holtom combined the semaphore signals for the letters N and D (Nuclear Disarmament) and explained his personal connections to the symbol ... " I was in despair. Deep despair. I drew myself: the representative of an individual in despair, with my hands palm outstretched outwards and downwards in the manner of Goya's peasant before the firing squad. I formalized the drawing into a line and put a circle around it. "

William Playfair, is considered to be the inventor of the pie chart, the bar chart, the circle graph and also the line graph. The pie chart made it’s debut in Playfair’s publication "Statistical Breviary" in 1801, where he used it to protest the excessive taxation system in Britain.