I've done as much as I can and want to do from the documentation for now.
Now I'm working on some of the responses to my posts here.

Pietro, I did

9fs sources
>

and installed fgb. I'm planning to look at that troff tutorial, the manpage
for juke, and the files in /sys/doc.

Here's what happened when I installed abaco and tried to use it:

term% contrib/install fgb/abaco
> a 386/bin/abaco 775 sys sys 1195651173
> a lib/font/bit lucidasans/passwd.6.font 664 sys sys 1138688455
> a sys/src/cmd/abaco 20000000775 sys sys 1175566971
> ...
> a sys/src/cmd/abaco/abaco.fonts 664 sys sys 1201369022
> term% man abaco
> *man: no manual page*
> term% abaco
> *abaco: can't initialize webfs: '/mnt/web/ctl' does not exist*
>