who has a mac os? the original Macintosh

I have a ten-year old PowerPC 7600 with Mac OS 8.1 on it. Word '95, Excel 5.0, etc... I also have the really old Mac Home System (I think it's from around 1985...). 512K of RAM - and no idea how to find an OS for it.
For who has a mac os? the original Macintosh try this:

• I have a ten-year old PowerPC 7600 with Mac OS 8.1 on it. Word '95, Excel 5.0, etc... ... ... I also have the really old Mac Home System (I think it's from around 1985...). 512K of RAM - and no idea how to find an OS for it. The computer still boots up, but shows a very unhappy Macintosh face icon when it can't find the OS! ... ... Now that I've found Windows, it would be hard to go back to Mac.
  
• i don't
  
• I don't do mac. ... ... I only use Vista. (Or XP Pro at School)
  
• Mac can go to ****!!!