This document presents discussions of four problems that may be found in the workplace. "AIDS in the Workplace: Employee Safety and Rights" (Robert Durham and Burton White) explores issues of employee/employer relationship and the issue of Acquired immune deficiency syndrome (AIDS) in the workplace. It concludes that the management of the AIDS infection in the workplace should ensure the safety of the employees and the prevention of handicap discrimination as the goals of labor and management. "Legal Challenges to Drug Testing in Public Employment" (Gene Mechanic) examines the relationship of the fourth amendment and drug testing. Other Constitutional challenges to drug testing and challenges under state constitutions are also discussed. The article concludes that it is crucial for employers and employees to work together to achieve a reasonable approach for dealing with drug use problems in the workplace. "Technical Issues and Procedural Safeguards in Workplace Drug Testing" (Steven Hecker) discusses analytical methods for drug testing, capabilities and limitations of drug screening techniques, and labor and management considerations in designing drug screening programs. "Sexual Harassment in the Workplace: Eliminating the Offensive Working Environment" (Paula Barran) discusses the development of legal standards and the employer's responsibilities to take prompt, appropriate, remedial action. "Overview of Legal Issues Relating to Smoking in the Workplace" (Jeffrey Merrick) discusses legislation on smoking, worker's compensation, and constitutional rights of workers. (ABL)