The Handbook of Chemistry and Physics on CD-ROM, Version 2006 provides a thorough range of critically evaluated data in a convenient, electronic format. This CD-ROM edition contains all of the information found in the 86th print edition augmented by a range of special utilities. New tables in this edition include: Proton Affinities, Electron Inelastic Mean Free Paths, Selected Properties of Semiconductor Solid Solutions, and Vapor Pressures (Solvent Activities) for Binary Polymer Solutions. Sections substantially revised and updated include NIST Atomic Transition Probability Tables, Summary Tables of Particle Properties, and Threshold Limits for Airborne Contaminants.