This picture to the left shows what the first nanogears will look like. These are one "nano" wide which is a billionth of a meter. These will be the first step in this new era of Nanotechnology.
First we have to be able to manipulate atoms, shown in the picture to the left. Then we will need to create tiny nanorobots to actually move the atoms called assemblers, and then create replicators which will create more assemblers and replicators.