There Are Things Known, and Things Unknown, and In Between Are the Doors
Jim Morrison

Backend

Python

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An interpreted, high-level, general-purpose programming language. Its language constructs and object-oriented approach aim to help programmers write clear, logical code for small and large-scale projects.

PHP

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A general-purpose programming language originally designed for web development.

Java

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A general-purpose programming language that is class-based, object-oriented (although not a pure object-oriented language, as it contains primitive types, and designed to have as few implementation dependencies as possible.