Be careful when talking about ASCII codes (and tables).

Standard ASCII is 7 bit, and so only covers codes 0-127.

The "extended" ASCII sets are 8 bit (0-255), and the extra symbols are used for national language replacement and things like line drawing characters.

The biggest problem is that the characters above 127 are not constant. This is why in DOS you used to have to load "codeset" pages, which installed a local version of the symbols - these are often called things like "Latin-8" or "IBM Line drawing".

We still have code pages even now,, especially in email and HTML - check out the "charset=" header found in mail headers and on web server responses which defines an ISO character set. You may occasionally get email from the Internet which has warnings that the character set is not supported where it comes from a country which uses a different alphabet. In the Roman alphabet world we would have trouble dealing with Kanjii or cyrillic alphabets unless those code pages have been installed.

Printers also have code pages - when you select a font in say Word, the application will translate it into typeface, weight, and character set amongst other things.

What all this means is that the symbols which appear may well be different on different PCs for the same number. Indeed, the symbol that appears in you Word processing document may not be the one that appears on the page when you print it.

If you want to see the same things you need to be sure that the devices are set the same.

The adoption of unicode will avoid these problems, as each symbol will have a unique number.