ZShell is the original standard, after they stopped upgrading it Usgard pretty much became the most popular. You can find all of them at http://www.ticalc.org or http://www.ti-files.com Further reading: http://members.xoom.com/tifaq/#2.4 http://www.ticalc.org/features/info/asmshells.html >In your opinion, what is the best ASM shell for TI-85? And where can >you get it?