INTRODUCTIONIndustrial psychology is concerned with people at work. It is also called personnel psychology. A closely related field is known as organizational psychology. Traditionally, industrial psychologists assessed differences between individual workers and evaluated individual jobs. Organizational psychologists generally seek to understand how workers function in an organization and how the organization functions in society. The distinctions between industrial psychology and organizational psychology are not always clear. Thus, the two fields are often jointly referred to as industrial/organizational psychology or I/O psychology. I/O psychologists work for businesses, consulting firms, government departments, colleges and universities. Industrial and organizational psychologists help determine fair pay scales, usually based on the skill and education levels a job requires and the hazards it presents. I/O psychologists also research the causes and ways to reduce workplace accidents. Industrial psychologists typically help employers find the best person for a position, evaluate job performance, and train employees. In developing a system for fitting an individual to a job, an industrial psychologist must first determine the particular knowledge, skills, and abilities that the job requires. The psychologist then designs a selection system to judge a candidate's qualifications for the position. The objective of such a system is to predict a person's performance in the workplace. Commonly used selection tools include interviews, reference letters, work samples, and tests of aptitude, abilities, knowledge, interests, and personality. The development of job performance evaluation methods is a major function...... middle of document.... ..s in the corporate world by establishing new standards to promote and better satisfy their employees. We have chosen four leading companies in four different sectors. The above analysis clearly reveals that one of the reasons these companies may be leaders in their industry is that they are well aware of the importance of labor. They also mention in their mission statements that yes, in fact, customers are important, but to make the customer happy, they must first motivate and satisfy the employee. According to Citibank, the general belief is that a happy worker is motivated and loyal. Keeping employee morale high is therefore a surefire way to maintain a productive workforce. A productive workforce would ultimately lead to a healthy organization that would benefit not only the company it works for, but also itself..