Transfer is defined as a change in job or workplace without affecting pay, position or responsibilities. The main purposes of transfer are to retain employees, recognize achievement, and fill vacancies. There are four types of transfers: replacement, versatility, shift, and remedial. Promotion is defined as an improvement in pay, prestige, position and responsibilities within an organization. The purposes of promotion include motivating higher productivity, attracting and retaining employees, recognizing achievement, and increasing effectiveness. Promotions are categorized as horizontal, vertical, or dry based on the level of increased responsibilities, pay, and prestige.