EO (stands for Elegant Objects or ISO 639-1 code of Esperanto) is an object-oriented programming language based on 𝜑-calculus. We're aware of popular semi-OOP languages and we don't think they are good enough, including: Java, Ruby, C++, Smalltalk, Python, PHP, C#. All of them have something we don't tolerate:

• types (why?)
• static/class methods or attributes (why?)
• classes (why?)
• implementation inheritance (why?)
• mutability (why?)
• NULL (why?)
• global scope (why?)
• type casting (why?)
• reflection (why?)
• scalar types and data primitives
• annotations (why?)
• operators
• traits and mixins (why?)
• flow control statements (for, while, if, etc)
• syntactic sugar (why?)

First, install Java SE, npm, and eoc.

Then, start with a simple EO program in app.eo file:

[args...] > app
  QQ.io.stdout > @
    "Hello, world!\n"

Compile it like this (may take a minute or so):

$ eoc link

Then, run it:

$ eoc --alone dataize app

You should see "Hello, world!" printed.