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Analog represents information in a continuous, smooth way - just like the real world. It feels natural, but it is vulnerable to noise and distortion. Digital , on the other hand, stores and transmits information by converting it into numbers. Some fine details may be lost, but the big advantage is that the quality does not degrade even after repeated copying or long-distance sharing. Introduction Today, I couldn’t sleep late at night (ㅠㅜ), so I decided to write a glossary-style article as a side topic: Analog vs Digital . Analog and digital are the two fundamental ways of representing information in nearly all technologies we use today. Whether we’re listening to music, watching a movie, reading a thermometer, or driving a car, both analog and digital are working around us at every moment. But when someone asks, “What’s the difference between analog and digital?” most people answer simply: “Analog is continuous, and digital is made up of 0s and 1s.” In this article, I’ll expl...

Hello, this is Jay. Today, I’d like to share some information about an upcoming IT seminar taking place at COEX in Seoul. From September 30 to October 2, 2025 , the Ministry of Science and ICT will host AI Festa 2025 at COEX Hall A in Samseong-dong, Seoul. This event is the largest AI exhibition and conference in Korea , offering a chance to explore the present and future of AI technology and its industries all in one place. Overview of AI Festa 2025 AI Festa 2025 is jointly organized by the Ministry of Science and ICT, the Korea Artificial Intelligence Software Industry Association, and the AI Festa Organizing Committee. While some sources mention over 400 participating companies, the official website currently lists around 150 exhibitors. With the government’s strong push for AI-related policies, a large number of visitors is expected, including students, industry professionals, researchers, startups, and policymakers. Why We Should Attend We now live in an era where underst...

macOS and iOS are operating systems created directly by Apple, powering MacBooks, iPhones, and iPads. Their hallmarks are stability, security, and deep integration with Apple’s ecosystem. macOS excels in creative fields like design, music, and video editing, while iOS is known for its intuitive interface and App Store ecosystem. Though they lack openness, they deliver differentiated value through consistency and optimization. Looking forward, both are expected to grow in influence as they integrate with AI, AR, and healthcare technologies. Hello, this is Jay. In the previous article, we explored the Android operating system. Today, let’s take a closer look at Apple’s operating systems - macOS and iOS. When people think of Apple devices, the first impressions are sleek design and intuitive usability. Yet behind these experiences lies the hidden star: Apple’s operating systems. MacBooks and iMacs run on macOS, while iPhones and iPads run on iOS. Together, they embody Apple’s philosoph...

 Android began in 2003 and was later acquired and developed by Google. Built on the Linux kernel, it has become the most widely used mobile operating system in the world, powering over 70% of smartphones globally. Thanks to its open-source nature, Android has been adopted across countless manufacturers and devices, offering users freedom and variety. However, it also faces challenges such as fragmentation and delayed updates. Today, Android extends beyond smartphones into TVs, cars, and wearables, standing as a central platform in the digital era of cloud, AI, and IoT.   Hello, this is Jay. In the previous article, we explored Linux. Now, let’s take a closer look at Android, the mobile operating system built on the Linux kernel. If we think of the operating system we use most in our daily lives, the answer is clear: Android. It powers smartphones, tablets, smartwatches, TVs, and even cars. It is, by far, the world’s most popular mobile operating system. Every time we wake...

 Linux, created in 1991 by Linus Torvalds, is an open-source operating system that is free, highly stable, and secure. It is widely used in servers, supercomputers, and smartphones (through Android). For everyday users, Windows is often enough. But for those who want to study computers in depth or pursue IT, learning Linux is an invaluable step. If Windows symbolizes popularity and convenience, Linux is the invisible foundation that supports the internet and modern IT infrastructure. Hello, this is Jay. In the previous article, we explored the Windows operating system. Today, let’s take a closer look at Linux. The Linux Mascot : Tux Among the operating systems we encounter today, Linux is always mentioned alongside Windows. Linux may not be as visible, but in reality, it is one of the most widely used operating systems in modern society. It runs behind the scenes in the internet servers we rely on, in smartphones, and even in home appliances. The history of Linux goes back to...

Windows, developed by Microsoft, is the core platform that led the popularization of personal computers. Successful versions such as Windows 95, XP, 7, and 10 transformed computer usage culture, and today the latest version is Windows 11. At present, Windows stands as the standard environment for both individuals and enterprises, preparing for the future by combining with security, cloud, and artificial intelligence. Hello, this is Jay. In the previous article, we explored operating systems in general. In this article, we will look specifically at Windows. The Windows Desktop The operating system we encounter most often in everyday life is undoubtedly Windows. More than just a program, Windows was the software that created a historic turning point, enabling the worldwide spread of personal computers. Whether we were doing school assignments, preparing reports at work, or enjoying games at home, Windows has consistently worked quietly in the background. At the center of this his...