File format with .DIS extension is used for storing workbook file composed of one or many spreadsheet files created with Oracle Discoverer software. Spreadsheet (or worksheets) files contain data generated with the use of Oracle database environment for further analysis, and may contain reports or charts/graphs.

DIS files are used in business analytics for creating reports based on information stored in organization’s database. Oracle software allows users to interactively search and retrieve data from database, perform multi-level data analysis and save the results. It supports bitmap indices for data warehouses and star queries.