File created by Finale, a music notation production program; contains music notation data such as a set of chords or articulations, text expressions, or document settings; similar to the common LIB file shown above.
To create a LIB file simply select File → Save Library..., check the type of library you want to save, click OK, choose your save location, name the file, and click Save.
To load the LIB file, select File → Load Library..., navigate to the location of your LIB file, select the file, and click Open.
Library of information used by a specific program; often contains functions and constants referenced by a program; may also contain actual objects, such as text clippings, images, or other media; typically referenced by applications and should not be opened manually.
NOTE: Windows dynamic libraries typically have a .DLL file extension. Macintosh dynamic libraries often have a .DYLIB extension.