Gloss: Gloss on Ebooks, Libraries, and Feelies
Of the three examples of library objects mentioned here, only functions really qualify. Commands and types of data objects are not part of the library of a programming language, they are constitutive of the language itself. (Except for commands like "read" and "write", which do call procedures that belong to the library). As for functions, some are original to the program, others are part of the library.