Microsoft PowerPoint Slide Show - Legacy (.pps)
The PPS file extension, short for PowerPoint Slide Show, is a legacy format used by Microsoft PowerPoint versions prior to 2007. It represents a completed slide show that opens directly in presentation mode, unlike the PPT format which opens in edit mode. PPS files are used for distributing and presenting finalized presentations. While newer versions of PowerPoint use the PPSX extension for similar purposes, PPS files are still supported by various presentation software and can be opened with Microsoft PowerPoint, OpenOffice Impress, and Google Slides.