Developers Dictionary

Developers, regardless of organization, often use a variety of terms to describe different concepts. Below is a list of definitions to help stakeholders better understand the language that Developers use.



React is a JavaScript library for building user interfaces, particularly single-page applications where efficient updating and rendering of components are crucial. Developed by Facebook, React allows developers to create large web applications that can update and render efficiently in response to data changes. It uses a declarative style and component-based architecture.


Redis (Remote Dictionary Server) is an open-source, in-memory data structure store used as a database, cache, and message broker. It supports various data structures like strings, hashes, lists, sets, and more. Redis is known for its high performance, flexibility, and simplicity.

Regression Testing

Regression testing is a type of software testing that ensures that recent code changes have not adversely affected existing functionality. It involves re-running previously completed tests to verify that the software continues to perform as expected after updates or modifications.

Relational Database

A relational database is a type of database that stores and provides access to data points that are related to one another. Data in a relational database is organized into tables, which consist of rows and columns. Relationships between tables are established using keys, and data can be queried using SQL (Structured Query Language).

Relational Database Management System (RDBMS)

An RDBMS is a database management system that uses a relational model to store, manage, and query data. It provides tools and capabilities for defining, querying, updating, and administering databases. Examples include MySQL, PostgreSQL, Oracle Database, and Microsoft SQL Server.


A repository in software development is a central location where data, files, and version-controlled information are stored and managed. Repositories are used to track changes, manage versions, and collaborate on code. Popular version control systems like Git use repositories to organize and store project data.

Responsive Design

Responsive design is an approach to web design that makes web pages render well on a variety of devices and window or screen sizes. It ensures that the layout and content adapt seamlessly to different screen sizes, providing an optimal viewing experience across desktop, tablet, and mobile devices.

REST (Representational State Transfer)

REST is an architectural style for designing networked applications. It relies on a stateless, client-server, cacheable communications protocol, usually HTTP. RESTful systems use standard HTTP methods (GET, POST, PUT, DELETE) to interact with resources identified by URIs (Uniform Resource Identifiers)


A RESTful API is an application programming interface that adheres to the principles and constraints of REST architecture. It allows for interaction with web services using standard HTTP methods and provides a structured approach to building scalable and flexible APIs.

Ruby on Rails

Ruby on Rails, often referred to as Rails, is an open-source web application framework written in Ruby. It follows the Model-View-Controller (MVC) architectural pattern and emphasizes convention over configuration, allowing developers to build database-backed web applications quickly and efficiently.


Runtime refers to the period during which a program is running or being executed. It encompasses the environment and resources (such as memory, processors, and libraries) that a program needs to execute. In programming, “runtime” can also refer to the runtime system or runtime environment that provides the necessary support for executing a program.