Category Computer Systems & Architecture

Reading Time: 4 minutesEvery time your code reads a file, sends a network request, or starts a new process, something important happens behind the scenes. Your program does not directly interact with the hardware or the operating system kernel. Instead, it makes a request. This request is called a system call. Most developers use system calls every single […]

Reading Time: 5 minutesModern computers contain dozens of hardware components: graphics cards, storage devices, network adapters, keyboards, sensors, and many more. Each of these components operates using its own internal logic and electrical signals. Operating systems, however, cannot directly understand the unique details of every hardware device. Instead, they rely on device drivers to act as interpreters between […]

Reading Time: 3 minutesEvery program written in a high-level language must eventually become machine instructions that a CPU can execute. Yet developers often simplify this process into a binary distinction: compiled languages are fast, interpreted languages are slow. In reality, modern execution models are far more nuanced. Many languages combine compilation and interpretation. Some generate intermediate bytecode. Others […]

Reading Time: 4 minutesModern operating systems are built around a fundamental separation: kernel space and user space. This distinction is not just theoretical—it directly impacts performance, security, stability, and application design. Whether you are developing backend services, writing system utilities, working with containers, or optimizing high-performance systems, understanding how these two spaces interact is essential. This article explains […]

Reading Time: 5 minutesModern computers run dozens, sometimes hundreds, of programs at the same time. Web browsers, background services, messaging apps, system processes, and development tools all compete for memory. Yet most systems remain stable even when memory pressure is high. One of the main reasons for this stability is virtual memory. Virtual memory is one of the […]

Reading Time: 3 minutesWhen choosing a computer, operating system, or software, you might notice terms like 32‑bit or 64‑bit. These labels refer to the architecture of a computer’s processor and operating system. Understanding the difference between 32‑bit and 64‑bit systems can help you make better decisions about performance, compatibility, and future‑proofing your technology. 1. What Does 32‑bit and […]

Reading Time: 3 minutesFile systems are the foundation of how computers organize, store, and retrieve data on physical storage devices like hard drives and SSDs. From saving a document to launching an application, file systems silently handle it all. In this article, we explore how they work behind the scenes. 1. What Is a File System? A file […]

Reading Time: 6 minutesWhen you press the power button on a computer, a lot of things happen before you see the desktop or login screen. This sequence is known as the boot process. It involves firmware, bootloaders, kernels, drivers, and system services working together to bring the machine from a powered-off state to a usable operating system. This […]

Reading Time: 7 minutesModern CPUs are extremely fast, but they rarely run at their full potential. Most of the time, they are waiting for data. The main reason is that memory is much slower than the processor. To reduce this gap, computers use a layered memory hierarchy: small but very fast storage close to the CPU, and larger […]

Reading Time: 4 minutesEvery program you write—no matter how high-level—eventually becomes a sequence of simple instructions that the CPU executes billions of times per second. Understanding how these instructions are processed gives developers deeper insight into performance, bottlenecks, optimizations, and the true nature of modern computing. This article takes you inside the machine to see how instructions travel […]