| IEE | http://www.ieee.org |
| ASME | http://asmedigitalcollection.asme.org |
| ASCE | http://ascelibrary.org |
| Springer | http://www.springer.com |
| ASTM Digital Library | http://enterprise.astm.org |
| McGraw Hill Engineering Library | http://2.accessengineeringlibrary.com |
| Elsevier | http://www.sciencedirect.com |
| Nature Science | http://www.nature.com |
| J-Gate Engineering | http://www.jgateplus.com |
| J-Gate Social and Management Science | http://www.j-gate.informindia.co.in |
| Proquest | https://search.proquest.com |
| GATE Preparation Papers | http://nptel.ac.in/gate_paper.php |