PSD file extension is called an Adobe Photoshop Document file.
Though some PSD files contain just one single image and nothing else, the common use for a PSD file includes much more than just storing an image file. They support multiple pictures, objects, filters, text, and more, as well as using layers, vector paths and shapes, and transparency.
Pds is extension are video files created using the PowerDirector program. These files can be movies, slideshows or just videos that are edited and saved using the said software.
I think false because, they didn't want it to be like the English writers that write straight and lined side-ways always, they write it anywhere and make it fit in to look more beautiful.
