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Bill Gates Image

William Henry Gates III (born October 28, 1955) is an American business magnate, investor, author, p...

Friday Oct 28, 1955 to Present
Symbian OS logo Image

Symbian is a discontinued mobile operating system (OS) and computing platform designed for smartphon...

1990s to Wednesday Jan 1, 2014
Willem Einthoven

Willem Einthoven (21 May 1860 – 29 September 1927) was a Dutch physician and physiologist. He invent...

Monday May 21, 1860 to Thursday Sep 29, 1927
Max Planck

Karl Ernst Ludwig Marx Planck was a German theoretical physicist whose discovery of energy quanta wo...

Friday Apr 23, 1858 to Saturday Oct 4, 1947
Mao Zedong 1963 - image

Mao Zedong also known by his courtesy name Mao Runzhi and the title Chairman Mao as Chairman of th...

Tuesday Dec 26, 1893 to Thursday Sep 9, 1976