help - What does Mlps mean on Audio CD's?

I’m seeing a lot of CD’s on Amazon with Mlps in the title. What does it mean?

this search lists a whole page of them
http://www.amazon.com/s/ref=nb_sb_noss?url=search-alias%3Dpopular&field-keywords=Mlps&x=0&y=0

Mini LP Sleeve. These are Japanese imports packaged in miniature reproductions of the original LP cover.

thanks!