An introductory book that thoroughly teaches the basics of office skills and information organization. This book is a test preparation problem collection that fully supports the Filing Designer Certification Level 3, with a total of 100 questions plus detailed answers and explanations. From business manners as a working adult to the basics of information organization and document management, it gently summarizes content that is immediately useful in practice. --- Contents and Features of This Book • Chapter 1: What it Means to Work Acquire basic skills for working adults, such as teamwork, communication, and time management. • Chapter 2: A Day in the Life of Subaru Learn how to proceed with work and the importance of reporting, informing, and consulting through the day of a new employee. • Chapter 3: Email and Information Management Explains business email etiquette, how to use CC/BCC, and information security. • Chapter 4: Desk Organization and Information Station Practically understand the basics of tidying up, the "5S" method, and the importance of labeling. • Chapter 5: Basics of Work Efficiency Explains skills for advancing work, such as PDCA, ECRS principles, and bottleneck improvement. • Chapters 6-10: Filing Theory and Practice From the basics of classification, arrangement, and storage to digital document management, access rights, and hybrid operation.