Embed fonts
Fonts can be embedded into a DVI file. For example, suppose foo.dvi uses cmr10.300pk and cmr10.360pk under -dpi=300. At the top of foo.tex
\AtBeginDvi{special{dviout `initialize -dpi=300 -TEXPK=^F/^s.^dpk>>>>{<<<<
is written and by
dviadd cmr10.300pk cmr10.360pk foo.dvi
foo.dvi contains the fonts. Then dviout does not use any outer fonts to display foo.dvi.