Pretty sure BPF originated in BSD land :) Prior to BPF there was "Enet Packet Filter", then Ultrix Packet Filter then something under SunOS before it became BP

Pretty sure BPF originated in BSD land :) Prior to BPF there was "Enet Packet Filter", then Ultrix Packet Filter then something under SunOS before it became BPF. BPF was created in 1990 (at Berkeley) which was widely BSD oriented.