Bitec

[mike wightman]

Peter Hamilton has toyed with biotechnology in a couple of his works - Fallen Dragon and the Night's Dawn trilogy.
Then there are the pentapods in 2300 and the Abyssals in the OTU (possible, but definitely IMTU)

Just watch this and shudder at the implications...

 

[kilemall]

Synaptic processors?

Don’t forget the rat brain computers from Cordwainer Smith.