Originally designed by a scum engineer who just wanted to see if it could be done, the biocore is a synthmorph with a biological brain. The design has since spread to those who wish to enjoy the advantages of sleeving in a synthmorph without the risk of brainhacking or who simply dislike the idea of using a cyberbrain (including some asyncs). Most models feature a stylized but transparent braincase, to show off the biocore's main feature, but others appear to be ordinary synthmorphs from the outside; only a detailed physical examination can determine that it actually contains a living brain.