An "online reference" refers to a<em> digital reference</em> that end users may utilize for their work or other daily activities. For example, if a person is looking for the <em>synonym of a particular word,</em> she may then refer to the thesaurus.
A blog is a website where you can find personal journals from different writers.
An e-book is an <em>"electronic book."</em> This allows people to read book digitally.
An e-zine is an<em> "electronic magazine." </em>This is a magazine in its digital form.
<span>Consider
the cement used for the foundation; the bricks and timber used for the
walls; and the shingles used for the roof. All of these are __________
in making the house.
