The display driver in A/UX is a text-based driver modeled after "STREAMS",
a UNIX form driver. A/UX's display driver is a full implementation of a
UNIX form driver, minus the multiplexing functions. The shell and
UNIX-executable files that are part of A/UX are text-based.
Most of the Macintosh ToolBox routines are accessible through A/UX as
library calls. These routines may be used in applications to create
Macintosh environments, just as with Macintosh OS applications.