This manual has the objective to provide the shift workers of the Osservatorio Vesuviano Monitoring Room with an useful support to carry out their activities. Specifically, it focuses on the guidelines for the use of information systems related to the analysis and management of seismic events. Shift workers, among their duties, have the task to perform the preliminary location of the occuring seismic events that has to be done by means of two specific systems: WinPick and WESSEL. The first program (WinPick), developed by Flora Giudicepietro [Open File Report n.6, Osservatorio Vesuviano,...