The Hot Line was established after previous methods of communication were found to be dangerously cumbersome.
Previous methods of refolding proteins can take days and to avoid this scientists rely on expensive production methods.
Previous methods of producing electricity employed frictional generation of static electricity, which led to high voltages and low currents.
They represented a profound break with previous methods of counting, such as the abacus, and paved the way for the development of algebra.
Previous methods of dating the virus had concluded it was a few hundred to 2,000 years old, "and that just didn't seem right," Dr. Hahn said.
"It's likely that Anonymous won't disappear after these arrests, but will instead revert back to its previous methods of nimble, surprise attacks on unsuspecting victims, committed by hackers who know what they're doing," Mr. Stryker said.
It was relatively simple for the Ottomans to preserve previous methods of local taxation in different parts of the empire while weaving them into a united whole through the veneer provided by the mukâṭaʿa financial units, whose tax revenues were assigned to Ottoman officials.
A comparison is made with previous methods of correlation.
