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R is for real world

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real-world learning
Real-world learning is learning using real world tools, practices, processes, etc. Ideally, for a real-world client on a real project.
Real-world learning is contrasted with most current learning which involves working with models, pretend clients, and throwaway, partial, “sandboxed” code removed from a real-world context.
responsive design (RWD)
Responsive web design (RWD) or responsive design is an approach to web design that aims to make web pages render well on a variety of devices and window or screen sizes from minimum to maximum display size to ensure usability and satisfaction.
Source: Responsive web design
Representational State Transfer (ReST)
The term representational state transfer was introduced and defined in 2000 by computer scientist Roy Fielding in his doctoral dissertation. It means that a server will respond with the representation of a resource (today, it will most often be an HTML, XML, or JSON document) and that resource will contain hypermedia links that can be followed to make the state of the system change. Any such request will in turn receive the representation of a resource, and so on.
An important consequence is that the only identifier that needs to be known is the identifier of the first resource requested, and all other identifiers will be discovered. This means that those identifiers can change without the need to inform the client beforehand and that there can be only loose coupling between client and server.
Source: REST
Return on Investment (ROI)
Return on investment (ROI) or return on costs (ROC) is a ratio between net income (over a period) and investment (costs resulting from an investment of some resources at a point in time).
A high ROI means the investmentʼs gains compare favorably to its cost. As a performance measure, ROI is used to evaluate the efficiency of an investment or to compare the efficiencies of several different investments.
As in financial investing, ROI in web development is the return you see from your investment of time, money, and effort to build a website or web application.
Source: Return on investment

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