1.Microsoft Windows: Developed and marketed by Microsoft, Windows is the most widely used desktop operating system globally. It accounts for nearly 72% market share for desktop and laptop computers.
Windows provides an intuitive and user-friendly graphical desktop, making it easy to use and navigate. It is versatile and supports various tasks such as word processing, browsing, gaming, software development, video editing, and more1.
2.Linux: Linux is a popular open-source operating system. It was developed by programmer Linus Torvalds in 1991. Linux runs in many organizations, private offices, mobile devices, supercomputers, and over the internet. It already contains almost all the features of the UNIX OS and has additional features. Various distributions of Linux exist, including Ubuntu, Debian, Solus, and Linux Mint. Linux is known for its security, compatibility, and flexibility2.
3.Android: Android is one of the most common operating systems today. It powers smartphones, tablets, and other smart devices. Developed by Google, Android is based on the Linux kernel. It dominates the mobile market and offers a wide range of applications and features for users2.
Comprehensive Detailed Step by Step Explanation:
1.Microsoft Windows:
oWindows is developed and maintained by Microsoft.
oIt provides a graphical user interface (GUI) and is user-friendly.
oWindows 10 is the current version, with earlier versions like Windows XP, Windows 8, and Windows 7.
oAdvantages: Compatibility with hardware, pre-loaded software, ease of use. Disadvantages: Cost, security threats, vulnerability to viruses.
2.Linux:
oDeveloped by Linus Torvalds in 1991.
oOpen-source and free of cost.
oUsed in various environments (organizations, supercomputers, etc.).
oDistributions like Ubuntu, Debian, and Linux Mint.
oAdvantages: Security, compatibility, flexibility. Disadvantages: Multiple versions, not ideal for gamers.
3.Android:
oDeveloped by Google.
oBased on the Linux kernel.
oDominates the mobile market.
oOffers a wide range of apps and features.
References:
1.Toppr: Commonly Used Operating System
2.Tecmint: Most Used Operating Systems in the World1

Hardware refers to the physical, tangible components of a computer system, while software refers to programs and instructions. Random-access memory, or RAM, is hardware because it is a physical set of memory chips installed in the computer, typically on removable modules. RAM provides temporary working storage for the operating system and applications while they are running, allowing fast read and write access compared to long-term storage devices. A compiler is software that translates source code into machine code. The kernel is software and is the core part of an operating system that manages resources such as processes, memory, and device access. The operating system itself is also software that controls the computer and provides services to applications. In Information Technology fundamentals, distinguishing hardware from software is a key concept: hardware includes CPU, RAM, motherboard, storage, and peripherals; software includes the operating system, applications, and programming tools. Since RAM is a physical component, it is the correct answer for the hardware part listed.