No science has ever been born on a specific day. Each science emerges out of a convergence of an increased interest in some class of problems and the development of scientific methods, techniques, and tools which are adequate to solve these problems. Operations Research (O. R.) is no exception. Its roots are as old as science and the management function. It's name dates back only to 1940.

p. 3; Partly cited in: Ivor Grattan-Guinness (2003) Companion encyclopedia of the history and philosophy of the mathematical sciences, Vol 1. p. 841 - Introduction to Operations Research (1957)