.AWSS files, standing for 'Applemac Works SpreadSheet' are the Apple Mac equivalent of .SS files on the PC, both of which can be opened using Microsoft Works on the relevant operating system (for assistance in converting these formats, please see the links sections below).

Microsoft Works is an office suite available from the Microsoft Corporation, available on the Windows and Apple Mac operating systems.

Works is considered to be a smaller, less expensive version of the Microsoft Office suite; it includes the Microsoft Works word processor, the Works spreadsheet, and the Works database.