Ei Compendex is an engineering bibliographic database published by Elsevier. The name "Compendex" stands for COMPuterized ENgineering inDEX. It covers scientific literature pertaining to engineering materials. It started in 1884 under the name Engineering Index (Ei) and its first electronic bulletin was issued in 1967. Elsevier purchased the parent company Engineering Information in 1998.
|Print title||Engineering Index|
Ei Compendex currently contains over 20 million records as of December 2020  and references over 5,000 international sources including journals, conferences and trade publications. Approximately 1,000,000 new records are added to the database annually from over 190 disciplines within the engineering field. Coverage is from 1970 to the present, and is updated weekly.
Coverage of engineering subjects include nuclear technology, bioengineering, transportation, chemical and process engineering, light and optical technology, agricultural engineering and food technology, computers and data processing, applied physics, electronics and communications, control, civil, mechanical, materials, petroleum, aerospace and automotive engineering as well as multiple subtopics within all these and other major engineering fields.
- EI History. Elsevier Engineering Information. Accessed May 6, 2009.
- Hane, Paula J. Elsevier Science Acquires Engineering Information. Information Today, Inc. 06 February 1998
- EI Welcome. Elsevier Engineering Information. Accessed December 19, 2020.
- Compendex & EI Backfile. Elsevier Engineering Information. Accessed February 20,2013.
- File summary. STN.FIZ Karlsruhe. Accessed June 16 2014.