The Institution of Electrical and Electronics Engineers (IEEE) is an non-profit organisation involved in advance development of all technologies related to electricity.
An Intranet is a network using the same protocols of the public Internet but on a private scale, within an organization.
For example a company may have an intranet for sharing informations between employees. That information would not be accessible outside of the company.
iTunes™ is a software application developed by Apple. It is available for Mac OS and Windows and can be downloaded freely from apple.com.
iTunes' original purpose was to allows you to manage your digital music library (mp3, aac, etc.), listen to music on your computer and synchronize your music with your iPod.
iTunes evolved into a media manager not just handling music/"tunes" but also Movies, TV Shows, Podcasts and more.
iTunes is required to access the iTunes store which lets you purchase music, videos and othe rmedia but also applications for the iPhone, as well as ringtones.
More info: http://www.apple.com/itunes/download/
The Tagged Image File Format (TIFF) is a non compressed bitmap image format, typically produced by scanners.
TIFF images typically include tags defining the characteristics of the image that is included in the file.