Wikipedia: Database (Popularity: )

Describes databases, their history, different models, applications, and other aspects.

Category: Science\Computer Science\Databases

Electromagnetic induction (Popularity: )

The phenomenon and Law of Electromagnetic Induction (new conception, 1980)
Category: Science\Physics\Electromagnetism\Courses and Tutorials

Wikipedia - Diesel Engine (Popularity: )

Free encyclopedia article covers diesel engine technology and applications. Addresses technical and historical background, types ...
Category: Science\Technology\Energy\Devices