“Articles: The words a, an, and the, which signal or introduce nouns. The definite article the refers to a particular item: the report. The indefinite article a and an refer to a general item or one not already mentioned: an apple.”
Excerpted from: Strunk, William Jr., and E.B. White. The Elements of Style, Fourth Edition. New York: Longman, 2000.
Mark's Text Terminal 