ASCII art was much more common in retro computing, but you can still find some fun modern examples like this project ... and has shared all the source code over at GitHub for anyone interested ...

As an example, the ASCII code for uppercase A is 65. Control characters are used to perform actions rather than to display a printable character on screen. Easily understood examples include ...

Each byte in the file contains one character that conforms to the standard ASCII code (see ASCII chart). Program source code, batch files, macros and scripts are straight text and stored as ASCII ...