Applications of OS in Real World & Prevalent Operating Systems

1. Applications of Various Operating Systems in the Real World

Different industries require completely different types of operating systems depending on whether they prioritize speed, security, 24×7 uptime, real-time safety, or battery life:

2. Prevalent Operating Systems (Detailed Overview)

Your DAVV BCA Unit 1 syllabus explicitly lists 7 prevalent operating systems: Windows, UNIX/Linux, Android, macOS, BlackBerry OS, Symbian, and Bada. In exams, you may be asked to write short notes on any 3–4 of these!

1. Microsoft Windows

• Developer: Microsoft Corporation (founded by Bill Gates and Paul Allen; first GUI version launched in 1985, evolved through Windows 95, XP, 7, 10, and Windows 11).
• Market Share: The world’s most popular Desktop/PC Operating System (over 70% global desktop share).
• Key Features:
  • User-Friendly GUI: Famous for its Start Menu, Taskbar, File Explorer, and Window management.
  • Hardware & Software Compatibility: Supports almost every printer, graphics card, and peripheral via Plug-and-Play, and runs the largest library of PC software (MS Office, Adobe suite, PC Games via DirectX).
  • File System & Security: Uses the NTFS (New Technology File System) with BitLocker encryption, Windows Defender, and User Account Control (UAC).

2. UNIX and Linux

A. UNIX

• Developer: Developed in 1969 by Ken Thompson, Dennis Ritchie, and their team at AT&T Bell Labs (written in the C programming language).
• Key Features: The pioneer of multi-user, multitasking, time-sharing operating systems. Built around the philosophy that “everything is a file” and provides a powerful programmable Shell (CLI) and hierarchical file system. Used heavily in enterprise servers and workstations (Solaris, IBM AIX, HP-UX).

B. Linux

• Developer: Created by Linus Torvalds in 1991 as a free, Open-Source UNIX-like kernel.
• Key Features:
  • 100% Free & Open Source: Anyone can view, modify, and distribute its source code.
  • Rock-Solid Security & Stability: Rarely crashes and is highly resistant to viruses due to strict user/root permission separation.
  • Popular Distributions (Distros): Ubuntu, Fedora, Red Hat (RHEL), Debian, Kali Linux.
  • Where Used: Powers 100% of the world’s top 500 Supercomputers, over 90% of internet web servers, and forms the underlying kernel of Android!

3. Google Android

• Developer: Initially developed by Android Inc. (Andy Rubin) and acquired by Google in 2005 (first commercial release in 2008).
• Architecture: Built on top of a modified Linux Kernel, designed specifically for touchscreen smartphones, tablets, Smart TVs, and smartwatches.
• Key Features:
  • World’s #1 Mobile OS: Powers over 70%+ of all smartphones globally (Samsung, Pixel, OnePlus, Xiaomi, etc.).
  • Open-Source (AOSP): Manufacturers can customize the UI, and users enjoy millions of apps via the Google Play Store (.apk / .aab packages written in Java/Kotlin).
  • Application Sandboxing: Each Android app runs in its own isolated virtual sandbox with explicit runtime permission prompts (Camera, Location, Microphone) for strong security.

4. Apple macOS (Formerly Mac OS X)

• Developer: Apple Inc. (introduced in 1984 as Macintosh System Software; modernized in 2001 as Mac OS X based on the Darwin UNIX / Mach kernel).
• Key Features:
  • Exclusive Hardware-Software Integration: Runs exclusively on Apple’s Mac computers (MacBook Air, MacBook Pro, iMac, Mac Studio) powered by Apple Silicon (M1/M2/M3/M4 chips).
  • Polished Aqua GUI & Ecosystem: Known for its ultra-smooth graphical interface, Dock, Spotlight search, and seamless continuity with iPhone and iPad (AirDrop, iCloud, Handoff).
  • File System & Security: Uses APFS (Apple File System), Gatekeeper app verification, and UNIX-based stability, making it a favorite among software developers, video editors, and graphic designers.

5. BlackBerry OS

• Developer: Developed by Research In Motion (RIM) (BlackBerry Limited, Canada) in 1999 for its iconic BlackBerry smartphones with physical QWERTY keyboards.
• Key Features:
  • Enterprise Security & Encryption: Was the gold standard for corporate executives, banks, and government officials (including heads of state) due to end-to-end encrypted communication via BES (BlackBerry Enterprise Server).
  • Push Email & BBM: Pioneered instant “Push Email” delivery and BBM (BlackBerry Messenger) using unique PINs.
  • (Later succeeded by QNX-based BlackBerry 10 in 2013 before BlackBerry shifted to cybersecurity software).

6. Symbian OS

• Developer: Created by Symbian Ltd. in 1998 (a joint partnership led by Nokia, Ericsson, Motorola, and Psion; originally evolved from EPOC32).
• Key Features:
  • The Smartphone Pioneer (2000–2010): Before Android and iPhone took over, Symbian was the world’s #1 smartphone OS, powering legendary Nokia phones like the Nokia 6600, N70, N95, and 5800 XpressMusic!
  • Ultra-Low Resource Footprint: Written in C++, it was engineered to run multitasking, 3G calls, Java ME games, and cameras on phones with as little as 16 MB to 128 MB of RAM and lasted days on a single battery charge.

7. Bada OS

• Developer: Developed by Samsung Electronics and launched in 2010 (“Bada” means “Ocean” in the Korean language).
• Key Features:
  • Goal: Samsung created Bada to convert affordable mid-range feature phones into touchscreen smartphones without paying licensing fees, powering the popular Samsung Wave series (Wave S8500, Wave II, Wave III).
  • Architecture: Featured Samsung’s TouchWiz UI, multi-touch support, 3D graphics, and native C++ applications before eventually being merged into Tizen OS (which now powers Samsung Smart TVs and appliances) as Samsung adopted Android for Galaxy phones.

3. Quick Comparison Summary of Prevalent Operating Systems

💡 Exam Preparation Tips for DAVV BCA

• DAVV examiners frequently ask a 5-mark short note on “Some Prevalent Operating Systems (Windows, Linux, Android, Symbian, Bada)”. Memorize the Summary Table above so you know the Developer, Target Device, and 2 key features of each!
• Don’t forget the fun trivia fact for Bada OS: “Bada” means “Ocean” in Korean and was developed by Samsung for the Samsung Wave series!