There is also the, rather terrifying, concept of focus from Vernon Vinge's Deepness in the Sky where brains are modified to turn people into intelligent single-

There is also the, rather terrifying, concept of focus from Vernon Vinge's Deepness in the Sky where brains are modified to turn people into intelligent single-purpose appliances/microservices: https://en.wikipedia.org/wiki/A_Deepness_in_the_Sky https://en.wikipedia.org/wiki/A_Deepness_in_the_Sky