اذا لم تجد ما تبحث عنه يمكنك استخدام كلمات أكثر دقة.
Dewey decimal system:- a system used by libraries to classify nonfictional publications into subject categories; the subject is indicated by a three-digit numeral and further specification is given by numerals following a decimal point; publications are shelved by number (Princeton WordNet 3.1)