If you have HP-48&#x2F;49 you can get an HP-41 emulator from <a href="http:&#x2F;&#x2F;www.hrastprogrammer.com&#x2F;emulators.htm" rel="nofollow">http:&#x2F;&#x2F;www.hrastprogrammer.com&#x2F;emulators.htm</a>. You can do synthetic programming on it.