Quoting from Wired:

In an act of selfless cyber preservation, a pair of German Web designers has created a working simulation of Apple Computer’s classic Mac SE on the Web.

The Web SE is a faithful replica of Apple’s iconic all-in-one Mac SE, rendered in Macromedia Flash.

The Web SE allows anyone, on any platform, to run a facsimile of Macintosh System 7, the Mac operating system circa 1990.