The extension AWS identifies tables (Spreadsheets) of the Spreadsheet Ability Spreadsheet in its own, proprietary format of the application.
An AWS file contains table cell values as well as formatting instructions, formulas, and possibly macros. These macros may also contain malicious code, which is why, especially with AWS files from unknown sources, it is advisable to scan them before executing the macros.
Spreadsheet is part of the Ability Office and not available separately. The software package is available in different editions and was also licensed by other manufacturers. These sell the products under their own name and with a partially adapted interface.