Berkeley Software Distribution is a UNIX operating system derivative developed and distributed by the Computer Systems Research Group of the University of California, Berkeley, from 1977 to 1995. More at Wikipedia
BSD Daemon - The BSD daemon, nicknamed Beastie, is the generic mascot of BSD operating systems.
Bill Joy - William Nelson Joy, commonly known as Bill Joy, is an American computer scientist.
Marshall Kirk McKusick - Marshall Kirk McKusick is a computer scientist, known for his extensive work on BSD, from the 1980s to FreeBSD in the present day.
Keith Bostic - Keith Bostic is a computer programmer from the United States.
Özalp Babaoğlu - Ozalp Babaoglu, son of former Turkish foreign officer Nazif Babaoğlu and his wife Şükran Babaoğlu, born in Ankara, Turkey, is a Turkish computer scientist.