But it is only one source of tension among many in the international monetary system.

ECONOMIST: Economics focus

The gap between the pantograph, which is the arm on top of the train car that draws power from overhead lines, and the catenary system must remain within a precise distance and tension.

WSJ: Commuters warned: Summer heat may slow Metro-North

The tension between the two parties is not just about the voting system.

ECONOMIST: Long grass, tough choices

Tension heightened this March after an unsuccessful attempt to murder Anatoly Chubais, head of power company Unified Energy System, architect of Russian privatization and the "father of all Russian oligarchs, " as Pravda put it.

FORBES: Magazine Article

However with the introduction of lighter weight and more flexible plastic substrate magnetic tapes, combined with a vacuum column to control the tension that the magnetic tape experiences during use, the IBM 726 was a prototype of the modern digital tape recording system.

FORBES: Magnetic Tape Turns 60