>#include <filename> does not even need to include a _file_ One of the stackoverflow answers (from Adrian McCarthy) states this; The VAX/VMS C compiler kept a

>#include <filename> does not even need to include a _file_ One of the stackoverflow answers (from Adrian McCarthy) states this; The VAX/VMS C compiler kept all the C runtime library headers in a single textual library file (similar to a unix archive), and used the string between the < and > as the key to index into the library.