A Hello, world!-program, is a simple computer program that displays the text “Hello,
world!” on the screen. It introduces the basics of any coding language, similar to learning an alphabet, and demonstrates the basic suitability of a programming language to communicate with a user via an output device. In a physical visualization of computer code, “Hello, world!” is spelt out here in three different ways, in binary code, in 8-bit code, and in hexadecimal code. These aspects form the core of computers and programming languages, facilitating effective communication with machines. The work provides insight into how a string of code can be made shorter through encryption, and where Hello, world! is the key to deciphering it - just like a rosetta stone for computer languages.