HP TextEngineer Technical Writing Guide manual Symbols for Units in General Use Cont’d

Company Writer's Guide

Symbols for Units in General Use (Cont’d)

Unit	Symbol	Notes
pound-force foot	lbf-ft
pound-force per square foot	lbf/ft2
pound-force per square inch	lbf/in2	Although use of the abbreviation psi is common,
		it should not be used as a symbol.
poundal	pdl
quart	qt	1 qt (UK) = 1.136 5 L
		1 qt (US dry) = 1.101 2 L
		1 qt (US liquid) = 0.946 35 L
rad	rd	A unit of absorbed dose in the field of radiation
		dosimetry. Use of the SI unit, the gray, is
		preferred. 1 rd = 0.01 Gy.
radian	rad	SI unit of plane angle.
rem	rem	A unit of dose equivalent in the field of radiation
		dosimetry. (Use of the SI unit, the sievert, is
		preferred. 1 rem = 0.01 Sv)
revolution per minute	r/min	Although use of rpm as an abbreviation is
		common, it should not be used as a symbol.
revolution per second	r/s
roentgen	R	A unit of exposure in the field of radiation
		dosimetry.
second (plane angle)	. . . ′
second (time)	s	SI unit of time.
siemens	S	1 S = 1 Ω-1
		SI unit of conductance. The name mho has been
		used for this unit in the USA.
sievert	Sv	SI unit of dose equivalent in the field of radiation
		dosimetry. Name adopted by the CIPM in 1978.
slug	slug	1 slug = 14.5039 kg

[For Illustration Only] B-15