a four-stringed musical instrument of the violin family, slightly larger than the violin; a tenor or alto violin. 2. a labial organ stop of eight-foot or four-foot pitch, giving tones of a penetrating stringlike quality. Origin of viola1. Italian.
PPT is a file extension for a presentation file format used by Microsoft PowerPoint, the popular presentation software commonly used for office and educational slide shows. All text images, sound and video used in the presentation are contained in the PPT file.
The IES file is the most common format in North America but is also widely used in Europe. IES photometric data files have the .ies filename extension. EULUMDAT (also known as LDT, after its file extension) is the de-facto industry standard photometric data file in Europe. Without a recognised standards organization to define and maintain it, EULUMDAT has remained largely unchanged since its introduction in 1990.