handle(Any token that a program can use to identify and access an object such as a device, a file, a window, or a dialog box; A pointer to a pointer; that is, a variable that contains the address of another variable, which in turn contains the address of the desired object)
descriptor(In information retrieval, a word, similar to an index entry in a book, that identifies a significant topic or element in a stored document or group of documents. It is used as a key in rapid search and retrieval of information)
