There are several new resources available online, notably 120,000 items from the Springer ebook archive, 1842-2004. These may make great course reserve readings as Springer has PDF chapter and whole book downloads; we have 2005-2015 as well.
Other recently added resources:
Elsevier Decision Sciences journals backfile (prior to 1994), includes information science, transportation, operations research
Engineering Case Studies online – streaming videos, accident reports
Momentum Press / Greenleaf Publishing (engineering and sustainability ebooks)
New Scientist – (from Elsevier 2006+; Google Magazines has backfile)
Society of Exploration Geophysicists Digital Library – expanded content
Springer ebook archive, 1842-2004 (65,000 titles)
See here for the complete list. Send any questions, suggestions for purchase to Jill Powell, Engineering Librarian, jhp1@cornell.edu