Digitalis obscura Digitalis obscura Digitalis obscura is a flowering plant, commonly known as the sunset foxglove or willow-leaved foxglove. It is native to regions in Spain and Africa, but can be grown as an ornamental flower around the world. It is a perennial woody plant belonging to the family Plantaginaceae. (Along with the other foxgloves it used to be placed in the figwort family, Scrophulariaceae; however, recent genetic research has moved the genus "Digitalis" to a larger family.) The sunset foxglove is similar to many of the foxglove species in its high toxicity and medicinal use as a source for the heart-regulating
Derive (computer algebra system) calculators. Derive (computer algebra system) Derive was a computer algebra system, developed as a successor to muMATH by the Soft Warehouse in Honolulu, Hawaii, now owned by Texas Instruments. Derive was implemented in , also by Soft Warehouse. The first release was in 1988 for DOS. It was discontinued on June 29, 2007 in favor of the TI-Nspire CAS. The last and final version is Derive 6.1 for Windows. Since Derive required comparably little memory, it was suitable for use on older and smaller machines. It was available for the DOS and Windows platforms and was used also in TI