The document discusses several early information systems and geographical apps that are used for disaster databases, including ReliefWeb, PreventionWeb, GDACS, and IRIN. It provides details on each platform such as their purpose, when they were established, location of duty stations, types of information and services provided. ReliefWeb collects disaster information from over 4,000 sources and is aimed at enabling effective humanitarian response. PreventionWeb is a knowledge sharing platform on disaster risk reduction managed by UNDRR. GDACS provides disaster alerts and risk analysis through cooperation between UN OCHA and EC. IRIN focuses on humanitarian news coverage and was formerly known as IRIN news agency.