in HTML the following characters need to be coded if they should appear in text:& &
< <
> >
" "
All other characters with a code between 32 and 127 may be coded, but there is no need to. All characters with codes between 128 and 255 are code-page-dependant (i.e. what is shown in the browser depends on what codepage is defined for the html file) All characters with codes above 255 must be coded.