The identity or image of a company is made of many visual devices:

• A Logo –  The symbol of the entire identity & brand.
• Stationary – Letterhead & Business Cards
• Marketing – Flyers, Brochures, Job Cards, Books, Invoice Books.
• Apparel Design – Tangible Clothing worn by employees. 
• Signage – Interior & Exterior Designs
• Room Branding – Anything visual that represents the business. 

All of these things make up an identity and should support the brand as a whole.  The logo however, is the the corporate identity and brand all wrapped up into on identifiable mark.