General Science Abstracts is a multidisciplinary index that includes all science fields. It has full text of articles from nearly 100 periodicals, dating as far back as 1995, graphs, charts, diagrams, photos, and illustrations and abstracting and indexing as far back as 1984 for many peer-reviewed journals.
IOPscience (Institute of Physics) offers online access to all the journal content hosted by IOP Publishing. That includes more than 60 titles covering different areas of science and engineering, which together provide access to more than 400,000 articles from 1874 to the present day
Physical Review Online Archive - PROLA searches the archives of the nine print journals published by the American Physical Society (APS). Full-text is provided for all journals back to their very first issue, the oldest being 1893. Includes: Physical Review Sections A-E, Physical Review (1893-1969), Physical Review Special Topics, Physical Review Letters and Reviews of Modern Physics.
Science Citation Index Expanded is a multidisciplinary index to the journal literature of the sciences. It fully indexes over 6,650 major journals across 150 scientific disciplines and includes all cited references captured from indexed articles.