The ability of a system to accept input intended for an earlier version of itself.

"Ensuring backwards compatibility allows users to upgrade software without losing access to their existing data or functionality."

A variable or placeholder commonly used in mathematics, programming, and formal languages to represent a dependent or output value, often in relation to the independent or input value represented by 'x' in equations, formulas, or functions.

"In the equation 'y = mx + b', 'y' represents the dependent variable."

A special type of subroutine called to create an object. It prepares the new object for use, often accepting arguments that the constructor uses to set required member variables.

"In Java, a constructor has the same name as the class and is used to initialize objects of that class."

Request for Comments, a publication from the Internet Engineering Task Force (IETF) that documents methods, behaviors, research, or innovations applicable to the internet and related technologies.

"The RFC proposed a new standard for email encryption."

A method of remapping one IP address space into another by modifying network address information in the IP header of packets while they are in transit across a traffic routing device.

"NAT is commonly used in routers to allow multiple devices on a private network to share a single public IP address."