Information technology (IT) skill shortages appear at the market level occasionally—usually for emerging technologies, unanticipated challenges, and/or unresolved issues such as systems security. Even when a market-level skill shortage does not exist, a firm can still suffer from skill shortages for its critical information system (IS) project and/or IT operations unless the firm plans and manages its needs for IT skills. This chapter first surveys IT skills at the market level and then at the firm level to gain a perspective on the issues. Attention turns to the nature and characteristics of skills in general—not just IT skills—by reviewing past literature. The management of skills is deeply rooted in the management of knowledge, skills, and abilities (KSAs) and human resource practices of the firm. Key issues and lessons are drawn from the literature in those areas. We conclude by considering the nature and characteristics of IT skills in developing an agenda for the effective management of IT skills.