accessibility: making Web content and services available and usable for people of all abilities and disabilities. Section 508 lists federal standards for accessibility.
aggregation, aggregated: when content from pages on a website is excerpted on a higher level page, leading the reader to the full article. Blogs often do this: the main blog page contains a short summary of many posts, each of which links to the full version of that post.
analytics: a tool for measuring the visitor traffic and effectiveness of a website.