Chest pain is an umbrella term to describe any pain or discomfort in the chest area (image of chest area). It may feel dull or sharp, last a few seconds to a few hours, occur in one spot or spread across the width of the body and down the arms.
file name - (computer science) the name given to a computer file in order to distinguish it from other files; may contain an extension that indicates the type of file. computer file name, computer filename, filename.
A file extension sometimes called a file suffix or a filename extension is the character or group of characters after the period that makes up an entire file name. The file extension helps an operating system, like Windows, determine which program on your computer the file is associated with.