Compound interest has been dated back to the Sumerians. It is defined as the initial deposit times one plus the rate raised to the power of time. i.e. exponential growth.
| 2400 BC | Sumerians | Compound Interest |
| 1000 AD | Persians or Indians? | Grains of wheat on a chessboard |
| 1973 AD | Black, Scholes & Merton | Black-Scholes |