Library

A file containing functions that are very commonly used by programmers. It is a space saving measure, if six programs all use a given routine having a library with that routine in it means the programs don´t need to contain their own copies. Used most frequently with assembly programs on the TI-89 family. Can cause difficulty, programs may be incompatible with a library if it is not the same version as the program expects or if it is not in the place the program expects it to be.