Review

A review is an evaluation of a publication as a film (a film review), video games, composing music (Music Review of a composition or recording), Appliance Book (book review), a piece equipment such as a car of the house, or a computer or an event or performance as a live music concert, a play, musical theater or dance. In addition to a critical evaluation, author of the review may assign the work a rating to indicate its relative merit. More loosely, an author may review current events, trends or items in the news. A compilation of reviews may itself be called a review. The New York Review of Books, for example, is a collection of essays on literature, culture and current affairs. National Review, founded by William F. Buckley Jr., is a powerful conservative organization magazine, and Monthly Review is a periodic long-term socialist.

In the literature, the literature review is a category of scientific paper, which provides a synthesis of research on a topic at this moment in time. A compilation of these reviews forms the core content of a 'tertiary' scientific journal, with examples including Annual Reviews, the Nature Reviews series of journals and Trends. A peer review is the process by which scientists assess the work of their colleagues who had been submitted for publication in the scientific literature. A review of software is also a form of peer review, by co-workers.

A consumer opinion refers to a written notice by the owner of a product or a service user who has sufficient experience to comment on reliability and whether or not the product or service meets its promises . An expert opinion generally refers to a review written by someone who has tested the products or services by several peers to identify which offers the best value for money or the best set of features. A review is purchased the system where the creator (usually a company) a new product pays a reviewer to review his new product.

Source : http://en.wikipedia.org/wiki/Review