Letterboxing is the process of adding black bars to the top and bottom of a movie or video after shrinking the whole image to fit a smaller screen, which otherwise could not accommodate the wide resolution of the film. This is done because most movies or films are shot in a widescreen format meant for the theaters, which is wider than the format...
A back-end system is any system that supports back-office applications. These systems are used as part of corporate management and they work by obtaining user input and gathering input from other systems to provide responsive output.
The separation of front-end and back-end computer systems simplifies the computing process when dealing with multilayered development and maintenance. Back-end systems deal with databases and data processing components, so the purpose of the back-end system is to launch the operating system's programs in response to front-end system requests and operations. In other words, the back-end system implements responses to what the front end has initiated.
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