[johnchristopher]

What do the blue and yellow line stand for ? edit: found the wikipedia page

> The diffusion of innovations according to Rogers. With successive groups of consumers adopting the new technology (shown in blue), its market share (yellow) will eventually reach the saturation level. In mathematics the S curve is known as the logistic function.

That graph seems to blur and merge the distinction between market share and saturation level.

[Synaesthesia]

Looks like the yellow line is cumulative adoption and the blue one is adoption rate.