How do firms attract applicants from the external labor market?

"The external labor market consists of prospects to fill positions that cannot be filled from within the organization. Recruitment is the process of attracting qualified people to form an applicant pool. Numerous methods are used to attract applicants, including print, radio, web, and television advertising. Hospitality and entertainment firms, such as Ritz-Carlton Hotels and Six Flags, frequently use job fairs to attract applicants. A job fair, or corporate open house, is usually a one- or two-day event at which applicants are briefed about job opportunities, given tours, and encouraged to apply for jobs. For firms needing accountants, engineers, sales managers, and others for professional and scientific positions, college recruiting is very common. These firms (Deloitte, Cisco Systems, Salesforce.com, and thousands of others) schedule job fairs and on-campus interviews with graduating seniors."