All quiet ....

There is so much to talk about, but alas I have a looming deadline. So instead, I'll just post an interesting graph of three different activities (in this case products).

The axes are:-

• Ubiquity : or how common an activity is, calculated from market penetration statistics and household / business surveys.

• Certainty : or how well an activity is understood, calculated from a ranking system that includes a relative total number of technical references cited in the British Library.

Ubiquity vs Certainty for TVs, Telephones and VCRs.
(click on image for larger size)

Now, I haven't highlighted which data set belongs to which product because it doesn't matter. They are all following the same approximation despite occurring over vastly different time ranges.

Is this an Everett's S-Curve? Not quite, I don't use time as an axis but certainty (so it does have a non-simple relationship with time).