Handbooks are full-text searchable and offer good overviews of technologies and topics. They are also excellent places to find figures, graphs and charts that you can use in presentations (with attribution).
Find more handbooks and manuals at the Engineering Library's ebooks page.
Indexes leading journals in the arts, humanities, sciences and social sciences. Allows cited reference searching. (ISI Web of Knowledge) [1900 - present]
Find more specialized article databases in engineering.