**Binary Multiplication**
**Three approaches**:

__Repeated addition__
__Treat as a multi-line addition__
__Repeated shift and add__

One of the earliest "multiplication" calculators was the BONES of John Napier. This was actually a device that converted the process of multiplication into the process of addition by displaying the multiplication tables on replaceable "bones".Napier spent a large portion of his life trying to solve the problem of "automating" multiplication, designing several different "machines". Explore emulations of his machines.

From the Science Museum, London

Last updated 2000/05/18

© J.A.N. Lee, 2000.