On 08/17/2011 11:28 AM, alan.b.pearce@stfc.ac.uk wrote: >> Check out Sage, which has an online notebook facility. >> http://www.sagemath.org/ >> >> For "desk calc" and basic math with comprehensive handling of physical >> units I use the Frink applet. http://futureboy.us/frinkdocs/ >> >> I also installed an HP48 emulator for access to its equation library. >=20 > I was going to say pick up an HP41 off eBay, except they are pricey for w= hat you get, and then if you want the add-on ROM pacs, they are through the= roof for price, as collectors items. >=20 >=20 If you have a Android phone you can download the Droid48 app and you'll have an HP48 in your hands. --=20 Linux Home Automation Neil Cherry ncherry@linuxha.com http://www.linuxha.com/ Main site http://linuxha.blogspot.com/ My HA Blog Author of: Linux Smart Homes For Dummies --=20 http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .