The following abbreviations (and acronyms) may be used without explanation. Any other should be defined when first introduced in manuscript.

alternating-current - ac

altitude - alt

anno Domini - A.D.

ante meridiem - a.m.

antilogarithm - antilog

aperture ratio 16 - f/16

approximate (in subscript) - approx

arccosecant - arccsc

arccosine - arccos

arccotangent - arccot

arcsecant - arcsec

arcsine - arcsin

arctangent - arctan

argument - erg

audio-frequency - af

average (in subscript) - av

Bardeen-Cooper-Schrieffer - BCS

body-centered-cubic - bcc

boiling point - bp

Boltzmannis constant - k,k_B

calculated (in subscript) - calc

center of mass - c.m.

centimeter-gram-second (system) - cgs

chapter - Chap.

chemically pure - cp

coefficient (in subscript) - coeff

cologarithm - colog

Company - Co.

complex conjugate - c.c.

confer (compare) - cf.

confidence limits - C.L.

constant - const

contact potential difference - cpd

continuous-wave - cw

Corporation - Corp.

cosecant - csc

cosine - cos

cotangent - cot

cubic - cu

curl - Vx

deoxyribose nucleic acid - DNA

determinant - det

deviation - dev

diameter - diam

direct-current - dc

District of Columbia - D.C.

divergence - div

east - E

edition - ed.

elastic (in subscript) - el

electromotive force - emf

electron paramagnetic resonance - EPR

electron spin resonance - ESR

equation - Eq.

equations - Eqs.

error function - erf

error function (complement of) - erfc

estimated standard deviation - e.s.d.

et alii (and others) - et al.

exempli gratia(for example) - e.g.

experiment(al) (in subscript) - expt

exponential - e,exp

face-centered-cubic - fcc

figure - Fig.

figures - Figs.

frequency-modulation - FM

gradient - grad

gram-atom - g-at.

gram-atomic-weight - g.at. wt

Hermitian conjugate - H.c.

hexagonal-close-packed - hcp

high-frequency - hf

hyperbolic cosecant - csch

hyperbolic cosine - cosh

hyperbolic cotangent - coth

hyperbolic secant - sech

hyperbolic sine - sinh

hyperbolic tangent - tanh

hyperSne structure - hfs

ibidem (in the same place) - ibid.

id est (that is) - i.e.

imaginary part - Im

Incorporated - Inc.

inelastic (in subscript) - inel

infrared - ir

inside diameter - i.d.

intermediate frequency - if

International Critical Tables - ICT

laboratory (in subscript) - lab

latitude - lat

limit - lim

linear combination of atomic orbitals - LCAO

logarithm - log

logarithm (natural, base e) - ln

longitudinal-acoustic - LA

longitudinal-optic - LO

magnetomotive force - mmf

maximum - max

melting point - mp

meter-kilogram-second (system) - mks

minimum - min

molecular orbital - MO

north - N

nota bene (mark well) - N.B.

not determined - N.D.

nuclear magnetic resonance - NMR

number - No.

observed (in subscript) - obs

of order less than - o ( )

of the order of - O( )

outside diameter - o.d.

page - p.

pages - pp.

Part - Pt.

post meridiem - p.m.

potential differecce - PD

probable error - pe

quantum chromodynamies - QCD

quantum eleetrodynamies - QED

quad erat demonstrandum (which was to be demonstrated) - Q.E.D.

radio-frequency - rf

random-phase approximation - RPA

real part - Re

reference - Ref. references - Refs.

ribonueleic acid - RNA

room temperature - RT

root-mean-square - rms

secant - sec

section - Sec.

sections - Secs.

Series - Ser.

signum function - sgn

sine - sin

south - S

square - sq

standard temperature and pressure - STP

Supplement - Suppl.

Systeme International - SI

tangent - tan

theory, theoretical (in subscript) - theor

total (in subscript) - tot

trace - tr,Tr

transverse-acoustic - TA

transverse-electric - TE

transverse-electromagnetic - TEM

transverse-magnetic - TM

transverse-optic - TO

ultrahigh-frequency - uhf

ultraviolet - uv

valence band - VB

versus - vs

videlicet (that is to say, namely) - viz.

Volume - Vol.

Wentzel-Kramers-Brillouin - WKB

west - W