[O] multiple modes in single buffer?

[David Rogoff]

I have a feeling I know the answer, but it's worth bringing up.  I'd 
like to have multiple modes for different regions of a file.  I'm using 
the "-*- mode: org -*-"  as the first line of my org files. However, 
many of my org files contains bits of c and Verilog code.  I'd like 
these regions to be formatted and use the faces for those modes.

Is this possible?

Thanks,

 David