ftp.nice.ch/pub/next/science/mathematics/RareMathToolDemo.N.bs.tar.gz#/Sample/Controller.h

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/* Generated by Interface Builder */

#import <appkit/Window.h>

@interface Controller:Window
{
    id	mathGraph;
    id	mathTool;
}

- plot:sender;

@end

These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.