Datacores are super-advanced "fully optical quantum" computing units that far superior than a human brain. One of them is more expensive than a nuclear aircraft carrier.

Nation-states or institutions were unable to afford them, and the few ever built were in the possession of the biggest hypercorporations.

dataDyne had 7 of them (until Joanna Dark destroyed 3 of them), Core-Mantis OmniGlobal has 3 and Carrington Institute has 2 (one of them housed in sub-level 9 of the Los Angeles offices).