Programming Languages

Delphi

https://www.silisoftware.com/applets/

JavaScript

https://www.w3schools.com/js/default.asp
https://www.silisoftware.com/scripts/
https://www.smashingmagazine.com/2019/08/shopping-cart-html5-web-storage/
https://demo.mifos.io/api-docs/apiLive.htm

Perl

https://www.perlmonks.org/
https://perlmaven.com/
https://www.tutorialspoint.com/perl/