The Health IT Workforce Curriculum was developed for U.S. community colleges to enhance workforce training programmes in health information technology. The curriculum consist of 20 courses of 3 credits each. Each course includes instructor manuals, learning objectives, syllabi, video lectures with accompanying transcripts and slides, exercises, and assessments. The materials were authored by Columbia University, Duke University, Johns Hopkins University, Oregon Health & Science University, and University of Alabama at Birmingham. The project was funded by the U.S. Office of the National Coordinator for Health Information Technology. All of the course materials are available under a Creative Commons Attribution-Non Commercial-ShareAlike License. Course description, learning objectives, author information, and other details may be found in the instructor manual. Component 4 - Introduction to Information and Computer Science Component Overview: For students without an IT background, this Component provides a basic overview of computer architecture; data organization, representation and structure; structure of programming languages; networking and data communication. It also includes basic terminology of computing. Unit Title Computer Software Unit Overview: This unit covers application and system software, with a focus on healthcare systems. It also describes the functions of operating systems, presents different operating systems, and defines the purpose and usage of file systems. Unit Objectives: By the end of this unit the student will be able to: 1. Define application vs. system software. (Lecture a) 2. Give examples of application software focusing on healthcare systems. (Lecture a) 3. Describe the functions of system software. (Lecture b) 4. List different types of operating systems. (Lecture b) 5. Explain the purpose and usage of file systems. (Lecture c)