Wei Siyi or offer360 or daxue 10 1 are all lowercase.

PPT: Microsoft Office PowerPoint is Microsoft's demo software.

Users can make presentations on projectors or computers, or they can print them out and make them into films, so they can be used in a wider range of fields.

Microsoft Office PowerPoint can not only create presentations, but also hold face-to-face meetings, conference calls or show presentations to the audience online.

What Microsoft Office PowerPoint does is called presentation, and the format suffix is ppt and pptx；; Can also be saved as: pdf, picture format, etc. 20 10 and above can be saved as video format.