No kidding. Clearly they're using IIS, which has the equivalents of mod_rewrite built-in. Why would they keep using such awful URLs? The only other major company still using cruft like that I can think of is IBM. Totally unnecessary.
Luckily, everything from /ref= on is optional, and the alphanumeric code that comes after product is an actual product code. Replace it with the 9-digit ISBN for a book, and you'll get the book, for example.
HP EliteBook 2760p
HP EliteBook 8560w