"During this time other efforts such as BSD, MINIX, etc were developed to be UNIX like-systems. However, one thing that all these UNIX like-systems had in commo

"During this time other efforts such as BSD, MINIX, etc were developed to be UNIX like-systems. However, one thing that all these UNIX like-systems had in common was the lack of a unified kernel." BSD and MINIX lack a Unified kernel? What?