You can get this information by looking at their web pages, by asking a receptionist at the organization for the appropriate contact name, or by contacting their Human Resources office directly. In the salutation, be sure to refer to the contact as Dr., Mr. or Ms., but never as Mrs. or Miss. Open your letter with a strong sentence that defines purpose of letter so that the person does not have to look for it. Your cover letter should follow the standard business letter format. See the example below. Proofread and carefully spell-check the letter for any errors.
Errors indicate poor communication skills and inadequate attention to detail.
Try to keep your letter of application interesting, but conservative should be your watchword.