AMSAT-DL Index http://www.amsat-dl.org/

AMSAT-OSCAR 40 Information by AMSAT-DL
http://www.amsat-dl.org/journal/adlj-p3d.htm

AMSAT Oscar 40
 http://www.g0mrf.freeserve.co.uk/ao-40.htm

AO
http://www.artieda.net/hb9dri/ao40logger/

AO40
http://ao40.homestead.com/

AO-40
http://f1afz.free.fr/ao40.htm

AO-40 Telemetry http://www.amsat.org/amsat/sats/ao40/ao40-tlm.html

DH2VA's portable AO-40 Mode-S reception system
http://gulp.physik.unizh.ch/ao40/

Phase 3D Project http://www.amsat.org/amsat/sats/phase3d.html

The N3IYR AO-40 ANTENNA
http://www.n3iyr.com/