During the last years Qualitative Research had achieved a space within the Information Systems field, due to the efforts of diverse in-vestigators in using research instruments coming from the Social Sci-ences and applying them to Information Systems problems. Usage of these instruments requires to know their variety and utility, which has been tried with efforts of organising that knowledge in classifications that relate them and describe them. These classifications are found both in Social Sciences as well as the Information Systems field. This work presents the organisation of those instruments, as a recopilatory and intensive work describing the theoretical part of those instruments integrated with their applications in Information Systems.