A new program for the compilation and evaluation of chemical kinetic data is described. Rate coefficient measurements are assessed for probable accuracy and precision. Transition‐state theory is often used to extrapolate measurements to higher temperatures. For every reaction reviewed, a recommended rate coefficient is given in the formk=ATn×exp(−B/T). Pertinent data and conclusions are summarized on a two‐page Data Sheet, each sheet covering one reaction or occasionally two or three closely related reactions. Twenty‐seven Data Sheets are presented for reactions important in modeling and understanding chemical lasers, hydrogen–oxygen combustion, hydrocarbon oxidation, and aluminum or boron propellant systems.