Acid-base equilibrium slide-rule
Analog balance
Apparatus for predicting the exact time of currents in terms of
Artificial tooth mold selector
Asset value calculators
Biorhythmic slide rule
Calculating rule useful for making eyeglasses
Calculation table for family planning
Calculator
Check digit calculator
Check digit calculator
Decision tree graphical computer
Decompression plan calculator
Device and method for chronic wound condition treatment
Device for calculating no decompression dive times
Estate and gift tax estimator
Fire protection calculator
Fuel saving aircraft descent calculator
Global time calculator
Global time calculator