A summary of spectroscopic and collisional atomic data for highly charged positive ions: oscillator strength, energy levels, transition probabilities, cross sections and rate coefficients of different elementary processes taking place in hot plasmas. The data is presented in abbreviated form using tables, figures and, if possible, scaling laws for different characteristics, complete with and ample references to the original literature.

1. Introduction.- 2. Atomic Structure and Spectra.- 3. Transition Probabilities.- 4. Radiative Characteristics.- 5. Electron-Ion Collisions.- 6. Ion-Atom Collisions.- 7. Ion-Ion Collisions.- References.