Whenever you read an issue of Time , Sports Illustrated or The Charleston Gazette , you are using a periodical.
Periodicals are magazines, scholarly journals, newspapers, and newsletters.
They are publications that are published at regular intervals or periods of time less than one year. Daily newspapers, weekly magazines, and quarterly journals are all periodicals. Many periodicals are written for a general audience whose readers are not expected to have specialized knowledge or training. We usually call these periodicals magazines . However, probably even more periodicals are written for specialists and have articles that cannot readily be understood by readers who lack that background.