system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What's that wall of gibberish text when you open some type file in notepad?

"¾xàÏù" An enormous wall of basically **that** is what you can expect when you open up any type of random file in notepad that isn't meant to be in notepad. What is it? What happens if you just erase a random part of this gibberish? What is it representing and is there any way to comprehensively read it?
gpt
You can classify computer files into two main types: text files and binary files.

All computer files are just a big sequence of numbers -- or in computer terms, bytes.

In a text file, each of these numbers is intended to corresponds to some human readable letter. For example, the number 65 usually corresponds to an "A". When you open these files in Notepad, it has an easy time translating each number to a letter for you to read.

In a binary file, anything goes. It could be a picture where each number corresponds to a color of a pixel; it could be a database file where the numbers could mean all sorts of things.; it could be anything at all. When you try to open these files in Notepad, it will attempt to translate each number into a letter, but since that data is not intended to be interpreted that way, you wind up with gibberish.