Ei Compendex is an engineering bibliographic database published by Elsevier.

[1] 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.

[2] Ei Compendex currently contains over 20 million records as of December 2020 [3] and references over 5,000 international sources including journals, conferences and trade publications.

Approximately 1,000,000 new records[4] are added to the database annually from over 190 disciplines within the engineering field.