Electronic processes in atomic systems are usually associated with the emission or absorption of photons or the emission of electrons. The spectroscopic study of these processes can therefore be made by the analysis of the electromagnetic radiation or by a measurement of the kinetic energies of electrons. While electromagnetic spectroscopy in the optical region has been made for centuries and in the X-ray region for many decades the electron itself has not been used very much to probe the electronic structure and the electronic processes. However, following the development in recent years of experimental devices for the exact analysis of electron spectra this type of spectroscopy has now produced some very encouraging results which indicate that the spectroscopy based on the direct observation of the electrons is a powerful method for the study of atomic and molecular systems. Electron spectroscopy also produces information which cannot be obtained by other types of measurement and there is a multiplicity of applications for this new type of spectroscopy. A brief account will be given of the work which has been done by our group at Uppsala in the field of electron spectroscopy for atoms and molecules. A more comprehensive account until the present year is given in references [1] and [2]