ftp.nice.ch/pub/next/science/mathematics/Mandel.6.4.N.bs.tar.gz#/Mandel/Mandel_main.m

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/*
 *   After generated by Interfacebuilder
 *   changed by R. Pajarola
 */

#import <stdlib.h>
#import <appkit/Application.h>

void main(int argc, char *argv[]) {
    NXApp = [Application new];
    [NXApp loadNibSection:"Mandel.nib" owner:NXApp withNames:NO];
    [NXApp run];
    [NXApp free];
    exit(0);
}

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