Digitalis obscura drug digitalis. Its strikingly distinctive amber- to copper-colored flowers give the species its name and help distinguish it from other members of the genus. "Digitalis obscura" is native to eastern to southern Spain and northern Africa. It occurs in both the mountains and the lowlands near the coast. However, it can be grown in many non-native areas as an ornamental plant. "Digitalis obscura" naturally grows well in dry climates and in high altitudes. Unlike many other foxgloves, it is drought-tolerant when it is deeply rooted and established. It thrives in average, well-drained soil with pH levels of 5.8–7.2. It may
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