Digitalis thapsi a useful factor in determining the genetic variability among specimens. The species is used as an ornamental plant. It grows well in half-shaded to sun-exposed areas. Moderate watering is required, and the plant has an average drought tolerance. The soil should have a pH of 5 or up to 8. It can grow in chalk, clay, loam, sand, peat, or combinations. Digitalis thapsi Digitalis thapsi, known commonly as Spanish foxglove, Spanish digitalis, and fingerhut foxglove, is a flowering plant in the genus "Digitalis" that is native to Spain. It was first described by Carl Linnaeus in 1753. It is of
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