Operating Systems, Office Suites, and Cybersecurity Fundamentals

Vocabulary flashcards reviewing core concepts, technical tools, licensing models, and platform architectures from Linux, Microsoft Office, Windows, Cybersecurity, macOS, Kali Linux, and Android.

Linux

An open-source operating system based on Unix, known for high stability, robust security, real multitasking, compatibility with multiple hardware architectures, and the freedom to modify and distribute its source code.

GNU General Public License (GPL)

The free and open-source license under which the Linux kernel is released, permitting users and organizations to run, study, share, and modify the software without per-user licensing fees.

Ubuntu

A popular Linux distribution focused primarily on ease of use for general desktop and server users.

CentOS / Rocky Linux

Linux distributions specifically tailored and optimized for enterprise server environments.

Arch Linux

A Linux distribution designed for advanced users who require complete control over the system configuration and installation.

Microsoft 365

A cloud-based subscription service for the Microsoft Office productivity suite that provides continuous feature updates, costing approximately \70\text{--}\$100\text{ USD}$ per year for Personal or Family plans.

Perpetual License (Microsoft Office)

A one-time purchase licensing model (such as Office Home & Business, priced between $\$150$ and $\$450\text{ USD}$) that provides a definitive edition without major future feature updates.

DirectX

A collection of application programming interfaces (APIs) built into Windows that provides native support for multimedia, rendering, and video games.

Active Directory

A centralized directory and administration service developed by Microsoft for managing domain networks and resources in enterprise environments.

BitLocker

A full-disk encryption feature included with Windows Pro (priced at approximately $\$199\text{ USD}$) and enterprise editions to secure data against unauthorized physical access.

TPM 2.0 (Trusted Platform Module 2.0)

A dedicated hardware security microcontroller required by Windows 11 to enforce advanced cryptographic and identity protection standards.

Backdoor

A covert access mechanism that bypasses standard authentication and security controls within a computer system or software application.

Malicious Backdoor

An unauthorized entry point installed by cyber attackers via malware, such as trojans or rootkits, to steal data or remotely command a system.

Legitimate / Debugging Backdoor

An access route built intentionally by hardware or software developers for maintenance and troubleshooting, which creates a critical vulnerability if exposed.

Incognito Mode (Private Browsing)

A local privacy setting in web browsers that prevents browsing history, cookies, site data, and form entries from being saved to the local device after the session window is closed.

macOS

Apple's proprietary, Unix-based operating system featuring POSIX certification, tight hardware integration, energy efficiency, and high resilience against traditional malware.

macOS California Landmark Naming Scheme

The naming convention adopted by Apple starting with macOS 10.15 Catalina, followed by Big Sur (11), Monterey (12), Ventura (13), Sonoma (14), and Sequoia (15).

Kali Linux

A Debian-based Linux distribution built specifically for advanced security auditing, penetration testing, digital forensics, and vulnerability assessments.

Rolling Release Model

A software delivery cycle utilized by Kali Linux that provides continuous, incremental updates to keep security testing tools perpetually up to date without reinstalling the OS.

Root User in Kali Linux

The default administrative account operating with complete system privileges in Kali Linux, making it hazardous for routine office or everyday desktop usage.

Android

An open-source mobile operating system developed by Android Inc., acquired by Google, and built on a customized Linux kernel primarily for touchscreen devices.

Honeycomb (Android 3.0 - 3.2)

A branch of the Android operating system designed exclusively for tablet devices.

Project Butter

An engineering initiative introduced in Android 4.1 - 4.3 (Jelly Bean) to achieve smoother animations and a more responsive touch interface.

Android Runtime (ART)

The application execution environment introduced in Android 5.0 - 5.1 (Lollipop) alongside the Material Design visual language.

Project Treble

A major system architecture redesign introduced in Android 8.0 - 8.1 (Oreo) that separates the vendor implementation from the core OS framework to speed up device updates.

Material You

A major visual redesign language introduced in Android 12 (internally code-named Snow Cone) offering personalized interface styling.

Android Modified Linux Kernel

The foundational core of Android responsible for hardware drivers, process management, memory allocation, network connectivity, and file system security beneath its custom runtime environment.