386BSD screenshot from 1992. You can find source code here

GitHub

GitHub - 386bsd/386bsd: 386BSD

386BSD. Contribute to 386bsd/386bsd development by creating an account on GitHub.

Today we use several derivatives such as FreeBSD, NetBSD, OpenBSD and others. There was a lawsuit and 386BSD died slowly while Linux introduced same time keep growing. Wikipedia has more info for you

386BSD - Wikipedia