A Logo is a design symbolizing ones organization. It is a design that is used by an organization for its letterhead, advertising material, and signs as an emblem by which the organization can easily be recognized, also called logotype.
A corporate identity or corporate image is the manner which a corporation, firm or business presents themselves to the public. The corporate identity is typically visualized by way of branding and the use of trademarks, but it can also include things like product design, advertising, public relations etc.
Graphic design is the process of visual communication and problem-solving through the use of typography, photography, and illustration. The field is considered a subset of visual communication and communication design, but sometimes the term "graphic design" is used synonymously.
A brochure is an informative paper document that can be folded into a template, pamphlet or leaflet. A brochure can also be a set of related unfolded papers put into a pocket folder or packet.