Medline includes journal articles and chapters in symposia, not whole books, indexing more than 3100 journals and other periodical publications.
Most current articles have abstracts.
There is systematic indexing for standardized medical vocabulary, and extensive use of acronyms, enzymes, gene names, and names of key reagents. This subset is limited to the items indexed using genetics or any of its synonyms, or any of the indexing terms in the genetics hierarchy. Many users have found this to be a useful place to start , though generally does not give all the references available on even a topic that appear to be firmly within its scope. The database is accessed through the NIH Entrez search system, which also provides access to nucleic acid and protein sequence data. How To Access This system can only be accessed through the Internet using a Web browser.