BASIS was developed by British Airways in the early 1990's as a computer database for the recording and actioning of flight crew air safety reports and, subsequently, safety reports from other employee groups. Each part of the system was identified as 'modules', the most widely adopted being "Air Safety Reports"(ASR). During the initial development process, the existing British Airways Flight Data Analysis programs which had originally been developed for autoland validation were added to the BASIS framework as additional modules. However, most external users of the BASIS system purchased only one or more of the 'reporting' modules.