DOI and PMID refer to unique identifiers, which can be used to locate articles online. The boxes on this guide link these services to the Library's FindIt! service, allowing you to access resources through Library subscriptions.
DOI stands for Document Object Identifier. This is a unique identifier that is assigned to an online journal article, online book or online book chapter. Most publishers assign these to their online content. A DOI can take you directly to an online resource, but the Library does not always have access at a publisher site. The DOI lookup links to any online access we have.
PMID is a unique identifier used in the PubMed database and can be used to look up abstracts in PubMed. The PMID lookup links to online access through the Library.
If you have a DOI or PMID for an article that you would like to obtain using Purdue Libraries subscriptions or via Inter-Library loan services, simply copy and paste the DOI or PMID in the box above and click search.
Examples to try (copy and paste these into the box above):
You can also install the Nomad Browser Extension which will automate the searching for you as you browse the Web.