zipper,
like everything in life - it GROWS - and gets slightly abrogated
you can just type the name and model number into google - BUT - in that there are many more sites on the net today - AND - now we have 'tagging' which mangles google's searching abilities somewhat - so there are a lot more 'hits' than there used to be of totally extraneous GARBAGE - so you have however many million 'hit's that you have to sort through to find the info you really are looking for
if you already have a specific item in mind, just go to that mb manufacturer's site and search there