Merge pull request #696 from Chalarangelo/glossary-terms-chalarangelo

[ENHANCEMENT] Glossary terms

glossary/Boolean.md

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+### Boolean
+
+Booleans are one of the primitive data types in JavaScript. 
+They represent logical data values and can only be `true` or `false`.

glossary/Currying.md

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+### Currying
+
+Currying is a way of constructing functions that allows partial application of a function's arguments.
+Practically, this means that a function is broken down into a series of functions, each one accepting part of the arguments.

glossary/DNS.md

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+### DNS
+
+A DNS (Domain Name System) translates domain names to the IP addresses needed to find a particular computer service on a network.

glossary/Domain-name.md

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+### Domain name
+
+A domain name is a website's address on the Internet, used primarily in URLs to identify the server for each webpage.
+A domain name consists of a hierarchical sequence of names, separated by dots and ending with an extension.

glossary/Object-oriented-programming.md

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+### Object-oriented programming
+
+Object-oriented programming (OOP) is a programming paradigm based on the concept of objects, which may contain both data and procedures which can be use to operate on them.
+JavaScript supports Object-oriented programming both via prototypes and classes.