A—reading, reference and copying J—lecture hallB—staff only K—reading room for reference booksC—closed shelves for undergraduates L—return depositD—information retrieval room M—reading room for Chinese social booksE—inter-library loan N—title catalogueF—display & reading room for new books O—circulation for foreign booksG—multi-media reading room P—card catalogueH—reference department office Q—periodicals and magazinesI—novelty researchExamples：(O)外文书刊借阅 (D)信息检索室