A slogan is a short saying or catchphrase, often used by political groups. Slogan is a distinctive or identifying phrase a catchword or rallying motto distinctly associated with a political party. Slogans are used to convey a message about the product, service or cause that it is representing. It can have a musical tone to it or written as a song. Slogans are often used to capture the attention of the audience it is trying to reach. If the slogan is used for commercial purposes, often it is written to be memorable/catchy in order for a consumer to associate the slogan with the product it is representing. Journals are highly specialized, although some of the oldest journals publish articles, reviews, editorials, short communications, letters, and scientific papers across a wide range of scientific fields. Journals contain articles that peer reviewed, in an attempt to ensure that articles meet the journal's standards of quality, and scientific validity. These journals are indexed with all their citations noted. The top open access journals are indexed in MEDLINE, PUBMED, SCOPUS, COPERNICUS, CAS, EBSCO and ISI.