A fully operational offsite data processing facility equipped with hardware and software, to be used in the event of a disaster.

"A hot site enables a business to continue computer and network operations in the case of a disaster or disruption."

Code that is executed frequently or is critical to the performance of a system.

"Optimizing hot code is essential for improving the overall efficiency and speed of an application."

The business of providing storage, connectivity, and services necessary to serve files for a website.

"Web hosting companies provide the infrastructure and services needed for websites to be accessible on the Internet."

The process of adding more instances of a resource to distribute load more evenly across them, often used in the context of databases and web applications.

"Horizontal scaling, or scaling out, can improve a system's performance and availability by adding more machines to handle increased load."

A technique used in programming to intercept function calls, messages, or events passed between software components.

"Hooking is often used in debugging and game modding to alter or augment the behavior of an original application."

In computing, a term sometimes used metaphorically to refer to a process or entity of which there must be only one in a given context or system.

"The 'Highlander principle' might be applied in software design to ensure that only one instance of a particular resource or service is active at any time."

In React, a higher-order component is a function that takes a component and returns a new component, allowing for component logic reuse.

"HOCs provide a powerful pattern for abstracting shared behavior and enhancing components in React applications."

A concept from type theory that allows types to take other types as parameters.

"HKTs are not directly supported in some programming languages, but they are crucial in the study of advanced type systems and functional programming."

A function that takes a function as an argument and returns a function.

"High-order functions in functional programming can be used for composing functions or applying a function to a list of arguments."

Referring to programming languages that are closer to human languages and further from machine language, making them easier to read, write, and maintain.

"High-level programming languages like Python and Java abstract away much of the complexity involved in direct hardware manipulation."

A type of algorithmic financial trading characterized by high speeds, high turnover rates, and high order-to-trade ratios that leverages high-frequency financial data and electronic trading tools.

"HFT strategies utilize algorithms to analyze market conditions and execute orders based on market conditions within fractions of a second."

A positional numeral system with a radix, or base, of 16, using sixteen distinct symbols, typically the numbers 0 to 9 to represent values zero to nine, and the letters A to F (or a to f) to represent values ten to fifteen.

"Hexadecimal is widely used in computing and digital electronics as a human-friendly representation of binary-coded values."

Short for hexadecimal, a base-16 number system used in computing as a more human-friendly representation of binary-coded values.

"Hexadecimal notation is often used in programming to specify colors, encode binary data in strings, and represent memory addresses."

The simplest program that can be written in a programming language, typically printing the phrase 'Hello, World!' to the console.

"Writing a 'hello world' program is often the first step in learning a new programming language."

A computer bug that disappears or alters its characteristics when one attempts to study it, often because of changes in the system's environment or timing.

"Heisenbugs are notoriously difficult to debug because they may not be reproducible under examination."

A specialized tree-based data structure that satisfies the heap property, in which the key (the value) at each node is greater than or equal to the keys in the children of that node for a max heap, or less than or equal to for a min heap.

"Heaps are used in algorithms like heap sort and to implement priority queues, where the highest (or lowest) priority element needs to be removed first."

Hashcat is a powerful password recovery tool capable of cracking hashed passwords. It supports various algorithms and attack methods for decryption.

"Security professionals often utilize Hashcat to test the strength of passwords by attempting to crack hashed representations stored in databases or configuration files."

A data structure that implements an associative array abstract data type, a structure that can map keys to values.

"A hash map uses a hash function to compute an index into an array of buckets or slots, from which the desired value can be found."

A function that converts an input (or 'message') into a fixed-size string of bytes, typically a digest that is unique to each unique input.

"Hash functions are commonly used in cryptography, data retrieval, and for integrity verification of data."

A physical computing device that safeguards and manages digital keys for strong authentication and provides cryptoprocessing.

"HSMs are used by organizations to secure transaction data, identities, and applications by encrypting and decrypting digital signatures."

Hardening involves securing computer systems by implementing measures to reduce vulnerabilities and enhance resistance to cyber attacks. It typically includes applying security patches, configuring firewalls, and disabling unnecessary services.

"After installing the operating system, the administrator conducted system hardening by disabling unused ports and services, and implementing strict access controls to enhance security."

The use of touch feedback in user interfaces to provide an immediate tactile response to user actions.

"Haptic feedback in smartphones simulates the feel of buttons or other interactions, enhancing the user experience."

The default scenario featuring no exceptional or error conditions, focusing on the execution of a program's core features.

"Testing the happy path ensures that the application performs as expected under normal conditions."

A reference to an object or resource in computing, used to manage and access the resource in various programming environments.

"File handles are used in programming to refer to and manipulate files without needing to remember the file's specific details or location."

The act of engaging in activities (such as programming or other media) in a spirit of playfulness and exploration.

"While hacking can imply malicious intent, in the tech community, it often refers to innovative problem-solving or tinkering with hardware and software."

To use a computer to gain unauthorized access to data in a system or to solve a problem in a clever or non-obvious way.

"Hackers often exploit vulnerabilities in software to access private information, but 'hacking' can also refer to creative problem solving."

a constraint of the REST application architecture that keeps the RESTful style architecture unique from most other network application architectures.

"HATEOAS allows clients to dynamically navigate APIs by including hypermedia links with the responses to guide the client on possible next actions."

An extension of HTTP that is used for secure communication over a computer network, and is widely used on the Internet.

"HTTPS encrypts the data exchanged between the web browser and the server, ensuring that sensitive information like passwords and credit card numbers are transmitted securely."

The foundation of data communication for the World Wide Web.

"HTTP is a protocol used for transmitting hypermedia documents, such as HTML, between client and server."

The standard markup language for documents designed to be displayed in a web browser.

"HTML elements form the building blocks of all websites, allowing for the creation of structured documents by denoting structural semantics."

A naming convention in computer programming where the name of a variable or function indicates its type or intended use.

"Although Hungarian notation can make code more readable, it's fallen out of favor in many programming languages that have strong type systems."

A character encoding developed by Herman Hollerith for use in the punched cards used in early data processing machines.

"Hollerith code was an important step in the history of computing, facilitating the automation of data processing and tabulation."

A self-referential adage which states that it always takes longer than you expect, even when you take into account Hofstadter's Law.

"When planning project timelines, it's wise to remember Hofstadter's Law to account for unforeseen delays."

A cloud platform as a service (PaaS) supporting several programming languages, that is used as a web application deployment model.

"Heroku makes it easy to deploy, manage, and scale modern apps, providing a range of services and support for multiple programming languages."

A high-level multiplatform programming language and compiler that can produce applications and source code for many different platforms from a single code-base.

"Haxe enables developers to write code once and easily target multiple platforms, such as JavaScript, Java, C++, and Python."

A standardized, general-purpose purely functional programming language, with non-strict semantics and strong static typing.

"Haskell is known for its high level of abstraction, enabling concise and expressive code that closely represents mathematical logic."

A popular templating engine for JavaScript, allowing developers to build semantic templates effectively with minimal logic.

"Handlebars.js simplifies the process of dynamically generating HTML by binding data to templates."

An open-source software framework for storing data and running applications on clusters of commodity hardware.

"Hadoop provides a reliable and scalable platform for big data processing and analytics by distributing the data and processing across many machines."

A computer that runs Apple's macOS operating system on hardware not authorized by Apple.

"Building a Hackintosh allows enthusiasts to enjoy macOS on custom, potentially more powerful hardware than what Apple offers."

Hack The Box is an online platform that offers challenges and environments for learning and practicing cybersecurity skills. It provides a hands-on experience in ethical hacking, penetration testing, and network security through various challenges and virtual labs.

"I practice Hack The Box to become a penetration tester. "

The second major version of the HTTP network protocol, used by the World Wide Web, which brings significant performance improvements over HTTP/1.x.

"HTTP/2 enables more efficient use of network resources and a reduced perception of latency by introducing header compression and allowing multiple concurrent exchanges on the same connection."

Standard response codes given by website servers on the Internet, helping to identify the cause of any issues.

"Common HTTP status codes include 404 for 'Not Found' and 200 for 'OK', indicating the request's success or failure."

Methods which indicate the desired action to be performed on a given resource.

"HTTP defines a set of request methods, including GET, POST, PUT, DELETE, and PATCH, each serving a different purpose in terms of interacting with resources."

An application-layer protocol for transmitting hypermedia documents, such as HTML.

"HTTP is the foundation of data communication for the World Wide Web."

The standard markup language used to create web pages.

"HTML tags represent the structure of web pages, allowing browsers to render the visible parts of web content."