Question : Problem: Free up Missing Hard Drive Space

I have a G5 with a 160GB hard drive that currently shows only about 14GB of free space. When I open my HD to see where all the hard drive space has gone so that I can clear it out the numbers just don't add up. Here is what it shows:
Applications 10.42GB
Application (Mac OS 9) 170.4MB
Documents 43.2MB
G4-G5 Projects 333.6MB
Library 12GB
System 1.89 GB
System Folder 207MB
Users 21.14GB

That does not add up tp 160 and I'm really not sure where to look next.

Also since I don't use MAC OS ( at all can I just delete it or do I need to uninstall it?

Thanks for the help.

Answer : Problem: Free up Missing Hard Drive Space

If you NEVER use OS9 you can delete the Applications(Mac OS9) and System Folder .. folders
You can use a great Free program called
Disk Inventory X - http://www.derlien.com/
IT shows a visual map of your HD .. you can spot large files and what is using up space.