Kaye and Laby provides tables of data, formulae, graphs and charts covering a wide range of science and engineering topics. Kaye and Laby Online is provided free and brought to you by the National Physical Laboratory, where Dr Kaye was Superintendent of the Physics Department in the 1930s. For 100 years, scientists working in a variety of fields, specialists, engineers and students have used Kaye and Laby as an invaluable reference for their work. At launch, the online version includes the entire, unedited contents of the 16th edition (published 1995) and is crammed full of tables of data, formulae, graphs and charts. This information spans topics from fundamental constants to fibre optics, superconductivity to Raman spectroscopy and many others. The contents will be regularly reviewed and updated to reflect advances and developments in the fields of physics and chemistry.