Charles Leonard Hamblin (1922 – 14 May 1985) was an Australian philosopher, logician, and computer pioneer, as well as a professor of philosophy at the New South Wales University of Technology (now the University of New South Wales) in Sydney.
Among his most well-known achievements in the area of computer science was the introduction of Reverse Polish Notation and the use in 1957 of a push-down pop-up stack.
This preceded the work of Friedrich Ludwig Bauer and Klaus Samelson on use of a push-pop stack.
The stack had been invented by Alan Turing in 1946 when he introduced such a stack in his design of the ACE computer.
Hamblin's most well-known contribution to philosophy is his book Fallacies, a standard work in the area of the false conclusions in logic.