imbed
immobilization
import license
import licensing
improvisational theater
in a line
in a theater
inbound yard track
incline
inclined plane
INCOMPLETE INFINITY
INCREASES AS
INCREMENT
Indian corn
Indian Valley RR
in different colors
industrial car
industrialization
industrialized country
industrial park
INF
in fall
INFINITY
INFINITY NEGATED WITH VERTICAL BAR
information center
INFORMATION SOURCE
INHIBIT ARABIC FORM SHAPING
INHIBIT SYMMETRIC SWAPPING
in honor of
initialing
in line
inorganic fertilizer
inquire
INSERTION SYMBOL
inside connected locomotive
installment
instill
institutionalization
insure
INTEGRAL
INTEGRAL AROUND A POINT OPERATOR
INTEGRAL AVERAGE WITH SLASH
INTEGRAL EXTENSION
INTEGRAL WITH DOUBLE STROKE
INTEGRAL WITH INTERSECTION
INTEGRAL WITH LEFT ARROW WITH HOOK
INTEGRAL WITH OVERBAR
INTEGRAL WITH TIMES SIGN
INTEGRAL WITH UNDERBAR
INTEGRAL WITH UNION
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