Romanization of Greek Greek numerals which employed the entire alphabet, including the nonstandard letters digamma, stigma, or sigma-tau (placed between epsilon and zeta), koppa (placed between pi and rho), and sampi (placed after omega). As revised in 2001, ELOT 743 provides for the uncommon characters to be given (in Greek) as $ for stigma, + for koppa, and / for sampi. These symbols are not given lower-case equivalents. When used as numbers, the letters are used in combination with the upper "keraia" numeral sign ⟨ʹ⟩ to denote numbers from 1 to 900 and in combination with the lower "keraia" ⟨͵⟩ to denote multiples
Pound-foot (torque) unit is often still referred to as the foot-pound (ft⋅lbf). Similarly, an inch-pound (though should be more correctly as "pound-inch") is the torque of one pound of force applied to one inch of distance from the pivot, and is equal to of a pound-foot. It is commonly used on torque wrenches and torque screwdrivers for setting specific fastener tension. Pound-foot (torque) A pound-foot (lbf⋅ft) is a unit of torque (a pseudovector). One pound-foot is the torque created by one pound of force acting at a perpendicular distance of one foot from a pivot point. Conversely one pound-foot is the moment