what is the classic environment? and why can't i open applications?

what is the classic environment? every time i try to install a new application, is says you can't open the application because the classic environment is no longer supported. what does this mean? help please

MacBook Pro, Mac OS X (10.5.8)

Posted on Nov 20, 2011 7:02 PM

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what is the classic environment? and why can't i open applications?

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