Abbreviations
Whilst CalQlata always tries to use generally accepted terms for abbreviations, to avoid confusion or misunderstanding, listed below is a description of each abbreviation used on this website.
If you do not find the abbreviation you are looking for on this page (e.g. 'V' for voltage), you should try the Symbols page
Abbreviation  Complete Term 

ABMA 

ABS 
acrylonitrile butadiene styrene 
ABS 

AC 

ALS 

Acos 
arccosine 
Acosh 
hyperbolic arccosine 
AFBMA 

AISI 

ANSI 

API 

Asin 
arcsine 
Asinh 
hyperbolic arcsine 
ASME 

ASTM 

Atan 
arctangent 
Atanh 
hyperbolic arctangent 
BHN 
Brinell hardness number 
BS 
British Standard 
BSI 

CAF 
compressed asbestos fibre 
CEV 

CMS 
comfortable minimum separation (between moving vehicles) 
Cos 
cosine 
Cosec & Csc 
cosecant 
Cosh 
hyperbolic cosine 
Cotan & Ctn 
cotangent 
DAF 

DC 

DIN 

DnV 

ETFE 
ethylene tetrafluoroethylene 
FEP 
fluorinated ethylene propylene 
FLS 

g 

G 

GiGo 

GMTo 
Greenwich mean time 
HMX 
high molecular weight (RDX) 
HNBR 
hydrogenated nitrile butadiene rubber 
HPHT 
highpressure/hightemeprature 
HSSC 
hydrogen stress corrosion cracking 
ID 
inside diameter 
IR 

ISO 

IWRC 

LH 
lefthand 
LHS 
lefthand side 
log 

m/c 
machine 
NACA 
The National Advisory Committee for Aeronautics (this body was incorporated into NASA in 1958) 
NASA 

NBR 
nitrile butadiene rubber 
NFPA 

OD 
outside diameter 
OTR 
offtheroad 
PE 

PA 
polyamide {nylon} 
PC 
polycarbonate 
PCD 
pitch circle diameter 
PEEL 
polyester elastomer 
PE 
polyethylene 
PEI 
polyester imide 
PETN 
pentaerythrite tetranitrate 
PFA 
perfluoroalkoxy 
pH 

PPE 
polyphenylene 
PP 
polypropylene 
PTFE 
polytetrafluoroethylene 
PUR 
polyurethane 
RAM 

RAO 

RDX 
research department explosive 
RH 
righthand 
RHS 

RHS 
righthand side 
RTJ 
ring type joint (flange gaskets) 
SAE 

SCC 
stress corrosion cracking 
Sec 
secant 
SF 

SG 

SHS 

SI 
system international (metric) 
Sin 
sine 
Sinh 
hyperbolic sine 
SLS 

SMYS 

SN 
stressnumber (fatigue curve) 
Tan 
tangent 
Tanh 
hyperbolic tangent 
TETRYL 
trinitrophenylmethyinitramine 
TFE 
tetrafluoroethylene 
THS 

TNT 
trinitrotoluene 
TPO 
thermoplastic olefins 
Trig 

UhmwPe 
ultrahigh molecular weight polyethylene 
ULS 

UNS 
unified numbering system 
USGS 

UTM 
universal transverse mercator 
UTS 

UV 

YS 
yield strength (stress) 