* '''19''' - Captain Albert Ball, [[VC]], MC, DSO & 2 bars, commences his career as a fighter pilot. By the time he is killed, aged 20, in 1917, he has become one of the [[First World War]]'s greatest air aces, accounting for at least 44 [[German]] aircraft.
* '''19''' - was the average age of front-line [[US]] service personnel fighting to defend democracy in [[Indochina]] during the [[Vietnam War]].
* '''19''' - [[Evariste Galois]] develops applies [[group theory]], and wrote it out completely on to the eve unsolvability of polynomial equations, before his death in a duel at age 20; it took old [[mathematicians]] a century to comprehend it.
* '''19''' - [[John D. Rockefeller]] starts a new company, turning an enormous profit in its first year, and became the most influential businessman in history.<ref>http://www.notablebiographies.com/Pu-Ro/Rockefeller-John-D.html</ref>
* '''19''' - [[Steve Jobs]] begins collaborating in electronics with Steve Wozniak<ref>http://www.ideafinder.com/history/inventors/jobs.htm</ref> in electronics, and developed the personal computer within two years.