You might also like to read this brief account of what radical adjacency means.

FORBES: How HP Could Have Saved Itself $10 Billion (And Its Share Price From Falling)

These options would have allowed HP to grow its radical adjacency strategy rather than be sunk by it.

FORBES: How HP Could Have Saved Itself $10 Billion (And Its Share Price From Falling)

Adjacency plays like that are where high risk innovation is played out by the likes of Apple and Amazon.

FORBES: Will The Samsung S4 Launch Drive Apple's Share Price Down?

Nick Vitalari and I called this radical adjacency and it reflects the importance of profound human knowledge over product.

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It has multiple options, across multiple market segments and it looks capable of developing a very strong adjacency portfolio too.

FORBES: Microsoft's Apple Killer Strategy - Options

They are different in that one recognises the power of adjacency, whereas the other is trying to change a profession.

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Narrow innovation goes hand in glove with what I have called elsewhere radical adjacency, the ability to enter new markets, with new products, at will.

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The CISCO approach to change has been through radical adjacency.

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But the S4 is not even an adjacency play.

FORBES: Will The Samsung S4 Launch Drive Apple's Share Price Down?

In traditional business thinking, any adjacency is a risk.

FORBES: How HP Could Have Saved Itself $10 Billion (And Its Share Price From Falling)

Google on the other hand has no problem with the vision or with making radical adjacency moves, has Google Plus growing alongside its communications ambitions and has incredible agility to go with it.

FORBES: CISCO, WebEx.