The .mpp file extension is the default file type created by Microsoft Project. Microsoft Project is part of the Microsoft Office product set. A .mpp file will typically contain a list of tasks that make up a particular project and allow the critical path of a project to be defined. These will contain tasks, owners, inter-dependencies, timescales. Microsoft Project also allows for visual aids such as a gannt chart to be created within the file.
The .mpp is a propriety file type created by Microsoft. Older .mpp files created by Microsoft Project before 1998 can only be opened by Microsoft Project 1998. The portability of an .mpp to other applications or platforms is restricted, with only a few options available.
JPG's are often used for web sites and email as they are generally smaller file sizes as they are lossy meaning that some image quality is lost when the JPG is compressed and saved. The resultant 'lossy' file means that quality can never be recovered. The JPG format is often used in digital camera memory cards. The JPG file is a great format as it often manages to compress files to 1/10 of the size of the original file which is especially good for saving on bandwidth.
JPG is a graphical file format for editing still images, it offers a symmetrical compression technique which is processor intensive and time consiming in both compression and decompression. JPEG is a joint standard of the International Telecommunications Union (ITU-T T.81) and the International Organization for Standardization (ISO 10918-1). JPEG involves a lossy compression mechanism using discrete cosine transform (DCT). Compression rates of 100:1 can be achieved, although the loss is noticeable at that level. Compression rates of 10:1 or 20:1 yield little degradation in image quality.
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