It came on different disk sets; you really only needed the 'a' (base) set, but the 'n'etworking set was useful if you wanted the thing to connect to anything else.

IIRC there were also

    d:   development (gcc, make, etc)
    e:   emacs (I think; I used vim at the time)
    x:   X11 base system
    xap: X applications
    y:   bsd games

probably several more