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    <pre class="lang-none prettyprint-override"><code>╔═══════════════╦═══════════════════════════╦═════════════════════════════════╗ ║ ║ class ║ module ║ ╠═══════════════╬═══════════════════════════╬═════════════════════════════════╣ ║ instantiation ║ can be instantiated ║ can *not* be instantiated ║ ╟───────────────╫───────────────────────────╫─────────────────────────────────╢ ║ usage ║ object creation ║ mixin facility. provide ║ ║ ║ ║ a namespace. ║ ╟───────────────╫───────────────────────────╫─────────────────────────────────╢ ║ superclass ║ module ║ object ║ ╟───────────────╫───────────────────────────╫─────────────────────────────────╢ ║ methods ║ class methods and ║ module methods and ║ ║ ║ instance methods ║ instance methods ║ ╟───────────────╫───────────────────────────╫─────────────────────────────────╢ ║ inheritance ║ inherits behaviour and can║ No inheritance ║ ║ ║ be base for inheritance ║ ║ ╟───────────────╫───────────────────────────╫─────────────────────────────────╢ ║ inclusion ║ cannot be included ║ can be included in classes and ║ ║ ║ ║ modules by using the include ║ ║ ║ ║ command (includes all ║ ║ ║ ║ instance methods as instance ║ ║ ║ ║ methods in a class/module) ║ ╟───────────────╫───────────────────────────╫─────────────────────────────────╢ ║ extension ║ can not extend with ║ module can extend instance by ║ ║ ║ extend command ║ using extend command (extends ║ ║ ║ (only with inheritance) ║ given instance with singleton ║ ║ ║ ║ methods from module) ║ ╚═══════════════╩═══════════════════════════╩═════════════════════════════════╝ </code></pre>
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    1. PODifference between a class and a module
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    1. USIan Kelling
    1. USSergii Shevchyk
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    1. COWhat is the superclass of 'Class' class ?
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      1. USAashish P
    2. COI got the hierarchy, Class -> Module -> Object -> BasicObject. Cool!!
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