Web Requests
HTTP Methods
The request methods used to retrieve, create, update, and remove web resources.
Coming Soon—
The library
Start Reading
A plain approach to the key concepts and foundations that drive the tech industry today, all explained clearly and accessibly.
01
Simple Concepts
Focused introductions to the essential building blocks used across systems, software, and the web.
Regular Expressions
Regex
Defines patterns used to identify, extract, or validate specific character sequences within text.
Read More↗Docker Containers
Docker
Builds, packages, and runs applications in lightweight, portable containers.
Read More↗Filesystem Metadata
Inodes
Stores file metadata such as ownership, permissions, size, and disk block locations.
Read More↗Structured Data
XML
A flexible, human-readable format for storing and transporting structured data.
Read More↗Data Protection
Encoding & Encryption
How information is represented for compatibility and protected for confidentiality.
Coming Soon—Text Editing
Vim
A keyboard-driven text editor designed for fast, precise editing in terminals and beyond.
Read More↗02
Complex Concepts
Broader systems where identity, infrastructure, telemetry, and security controls work together.
Directory Services
AD Basics
A clear map of Active Directory: forests, domains, identities, authentication, policy, permissions, and hardening.
Read More↗Security Monitoring
SIEM Basics
How security platforms collect, correlate, and investigate events across an environment.
Read More↗Endpoint Security
EDR Basics
How endpoint detection and response tools monitor devices, detect threats, and support investigations.
Coming Soon—Host Protection
HIPS Basics
How host intrusion prevention systems detect and block suspicious activity directly on individual devices.
Coming Soon—A space to discover & learn
A Space to Discover & Learn
This page is a place where anyone can come to discover and learn the basics of the most relevant concepts in the tech industry — completely free of cost. Whether you’re just starting out or brushing up on fundamentals, the goal is to offer clear, accessible, and well-organized knowledge to empower curious minds and future innovators alike.
Read about Plain Library