👉 Let's talk about a word: "04 filter". What does that mean? It stands for "Open Filter 4." You've probably heard of this term before, but what is it?
Imagine you have a list of items in your computer's file system and need to sort them by their importance. In Unix/Linux systems, the first thing you do when opening a file is to use the "ls" command. That will give you a list of all files in your directory. You then look for directories with a name starting with 04. If you find one that matches, it means the file or directory has been opened by another user and needs to be filtered out so it can only be processed later. This process is called "filtering". Now, let's imagine we have a bunch of files in our system that are too old for us to open them. Instead of deleting these files manually, we need to use some sort of filter to make sure they don't get opened by anyone else. So, what's the filter? It's called "04 filter". You might not even realize it yet, but you've been using this little tool all along! And here's an example sentence that uses this word: "Remember when your first computer didn't have 04 filters to open files? Well, now you can use them to keep track of everything and make sure nothing gets in the way."
