Chem4kids
Chem4 Kids: Symbols in Chemical Equations
Chem4Kids! provides an overview of the symbols representing numerical values in chemical equations. Each symbol is defined and described.
University of Sydney (Australia)
Equations for Thermodynamics
An exhaustive list of equations and formulas which are commonly used in thermal physics (including equations for triple point). Equations are organized according to category. Meaning of the symbols is clearly stated.