A rectangle, also called a rectangle, is a parallelogram with one right angle, and all four of its angles are right angles.

A regular polygon is a polygon where all the sides are equal and all the angles are equal.

A right angle is an angle that is exactly 90 degrees, and it's the standard in math for comparing other angles.

A right triangle is a triangle that has one angle of 90°.

Environment in which software executes.

Software environment providing execution services.

Storage location for source code or software packages.

A distributed version of software.

Restructuring code without changing its intended behavior.

Ability of software to operate correctly over time.

Value produced by a function.

Technique where a function calls itself.

Period when a program is executing.

Error occurring while software executes.

Value identifying or referring to another object or resource.

Memory-management technique tracking active references.

Ability of software to inspect its own structure at runtime.

Needed capability or condition of a system.

Design adapting to different screen sizes.

Web design adapting to device dimensions.

Server that forwards client requests to backend servers.

Mapping requests or URLs to application handlers.

Architectural style commonly used for web APIs.

API following principles commonly associated with REST.

Database system based on relational tables.

Database storing data in related tables.

Individual record in a database table.

Collection of related data values.

Returns all right-table records and matching left records.

Reverses uncommitted transaction changes.

Ensuring relationships between related records remain valid.

Copying data between database systems.

Association between data entities.

Testing to ensure changes did not break existing behavior.

Ability to consistently reproduce a problem.

Fundamental reason a problem occurred.

Process for determining the underlying cause of a problem.