http://www.reglasdecalculo.com

http://www.rekenlinialen.org

http://www.linealis.org/

http://www.rechenschieber.org/index.html

http://www.oughtred.org/

http://www.uksrc.org.uk/

http://arc.reglasdecalculo.org/

https://groups.yahoo.com/neo/groups/sliderule/info

http://www.sliderulemuseum.com/

http://www.photocalcul.com/

https://groups.yahoo.com/neo/groups/sliderule-trade/info

http://www.nicolamarras.it/calcolatoria/

http://web.archive.org/web

http://www.joernluetjens.de/sammlungen/rechenschieber-eng.htm

http://www.sphere.bc.ca/test/sruniverse.html

http://www.rechenschiebersammlung.ch/