ELI5: Explain Like I'm 5
Examples: bayes theorem, how moss grows, ww2, tesseract, how do magnets work?

Code page 437

Code page 437 is a type of computer language that tells a computer what characters to show on the screen. For example, if your computer screen has a frowning face, code page 437 is like the instructions that tell the computer what it needs to show so you can see the frowning face.
Related topics others have asked about:
ANSI, ASCII, Alt code, Atari ST character set, Semigraphical character