Reference material includes:
You can use them to gather background material, or to check facts or definitions.
EPS Library has its core reference collection on level 1 by the casual reading area - to your right when you come into the library. These books can be used in the library.
The Library also has a lot of reference material online.
CRCnetBASE Consists of a compilation of essential engineering information, including data, facts, figures, graphs, equations, illustrations, and charts. It covers the disciplines of aerospace engineering, civil engineering, electrical engineering, electronics, general engineering, industrial engineering management, machine design, mechanical engineering, packaging, biomedical engineering, computer engineering, electrical engineering communications, engineering management, industrial engineering & manufacturing, lasers & optical engineering, manufacturing processing, nanoscience/nanotechnology and system engineering.
McGraw-Hill Concise Encyclopedia of Science and Technology by 
McGraw-Hill Dictionary of Scientific and Technical Terms by 
McGraw-Hill's Engineering Companion by 
The Biomedical Engineering Handbook by 
Concise Encyclopedia of Materials Characterization by 
Dorland's illustrated medical dictionary by 
Handbook of Human Factors and Ergonomics by 