Optical emission spectroscopy is an analytical technique used in laboratories worldwide for compound analysis, production control, research and development, material inspection and many other applications in variety of industries. Spectra Heap is a fundamentally new and unique reference source for analysts using this technique. It brings all the data required in analyst's everyday work in a convenient and compact form. It eases and widens the use and search of spectral data. It also serves as essential tool for professional education and training. It opens new endless possibilities in daily practice of spectral-analytical methods.