# Slide Rule Scale Markings by dfhercbml

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```									Slide Rule Scale Markings
The table below consists of a list of some of the conventional symbols for scales on standard
slide rules.

Conventional          Mathematical   Descripiton
Symbol                Relationship
A                     x2             square of D
AI                    1/x2           reciprocal of square of D
B                     x2             square of D (on slide)
BI                    1/x2           reciprocal of square of D (on slide)
C                     x              principal scale (on slide)
CF                    πx             folded principle (on slide)
CI                    1/x            reciprocal of principal (on slide)
CIF                   1/πx           reciprocal of folded principal (on slide)
D                     x              principal scale
DF                    πx             folded principal
DI                    1/x            reciprocal of principal
DIF                   1/πx           reciprocal of folded principal
K                     x3             cube of D
L                     log10 x        common logarithm of D
LL0                   e0.001x        exponent of x.10−3
LLI                   e0.01x         exponent of x.10−2
LL2                   e0.1x          exponent of x.10−1
LL3                   ex             exponent of x
LL00                  e−0.001x       exponent of −x.10−3
LL01                  e−0.01x        exponent of −x.10−3
LL02                  e−0.1x         exponent of −x.10−2
LL03                  e−x
√              exponent of −x
Ps or P               √1 − x
2     cosine of sin−1 D
Pt                      1 − x2       tangent of cos−1 1/D
S                     sin−1 x        D is the sine of angle S
180x
ST                     π