PDF is a intended for printable documents, and on-computer viewing but not as
'web pages' as such.
Acrobat 5.0 I think can support html and javascript and such so the later
versions, yet they support some web elements such as online forms for submission
(like html forms).
Unfortunately, clients and employers don't really care how you do it, just so it's done
They send you the file in a .pub or .pdf and expect you to just copy and paste it into their web. Can't be done reliably
..pdf is a simple solution and providing a link to the latest adobe reader is a no brainer.