A common joke among Apple coworkers is: "One year at Apple is equivalent to six years at a normal company. Every day, they have to answer more than 100 emails, attend at least four to five meetings on average, have many pre-meetings, and endure all kinds of friction between departments... How do Apple employees achieve excellence amidst such a busy schedule? The author, Ji-Soo Park, has 20 years of experience as a developer in Silicon Valley, having worked at Hynix, one of Korea's leading semiconductor companies, and then four years at Apple, a place where it is said that it is difficult to last even three months, and is now working at Meta as the manager of the Augmented Reality Hardware Display Development team. With his rich experience in top companies, he introduces the management culture of Jabs in detail through this book, from goal setting, communication, time management to the whole process of improving professional skills. He also reveals the unique working methods he has experienced at Apple without hiding anything.