This Handbook on Computer Techniques for Radio Frequency Spectrum Management should be considered as a supplement to the other two ITU documents on related issues, which include: Handbook on Spectrum Management at the National Level (2005 edition) and Handbook on Spectrum Monitoring at the National Level (2002 edition). The issue of effective and automated spectrum management process has become a priority for each administration. In October 2003, the ITU-R IC1 Study Commission established a panel of rapporteurs to analyse the outdated text and prepare a new version of the Handbook on Computer-based Radio Frequency Management. The basic elements required for spectrum management have been analyzed and successfully updated to make this publication more user-friendly. The user-reader can find the main material and numerous examples of the effective implementation of projects of automated spectrum management, which can help him in achieving the goal of introducing automated spectrum management in the shortest possible time.