Medion multimedia Keyboard latout?

I have just aquired a Medion 5100 pc and all that Medion support can
tell me is that I have a typical multimedia key layout. There seems to
be a scroll wheel on the LHS and two buttons marked 1 and 2.
Across the top are a search button, a folder containing an asterisk,
left and right arrows, a button with an x in disc, an elliptical array
of what appear to be player/recorder controls, a speaker mute, an
envelope which loads my Mozilla mail/news, a home button which loads
Mozilla home page, a calculator button, what may be a turn off button
and a hibernate button.
Surely there must be standards for these layouts.
Dick