Reference
The numbers a calculation reaches for mid-flight — looked up here, cited where they came from, and one tap from the solver that needs them.
Constants →
361 constantsPhysical and mathematical constants — exact where they are exact, sourced where they are measured, each with the formulas that use it.
Periodic Table →
118 elementsEvery element’s numbers: atomic mass, density, melting and boiling points, electronegativity, and the rest of the row a chemistry problem asks for.
Fluids →
16 fluidsDensity, viscosity and specific heat at working temperatures — water, air, glycols and the other fluids real systems pump.
Steam Tables →
IF-97Saturation both directions, superheat, and the region logic — the industrial formulation, not a scanned appendix.