Panel one refers to an attack that works on most versions of the Linux OS. (Assuming you're five, linux is an alternative to Windows. Android phones and Mac computers use a version of this.)
Try to run the :(){ :|:& };: command on linux, hit enter, and the computer will very quickly stop working. This attack is called a "forkbomb". It eats up all your computer's RAM memory, freezing the computer, so the only thing you can do to fix it is slam the power button and hard restart it.
This one's famous in particular because of how short and weird looking the code for it is. That's mostly just a quirk of the language its written in.
Panel two refers to an attack called to an SQL injection. Large computers tend to store information in databases. SQL is a computer language used to interact with these databases. The 'injection' part refers to a bunch of common types of hacks that you can use to do shady stuff to these databases.
In MB's case, it's first saying "give me admin access to your systems" and then saying "and then delete all your downloaded media"
My syntax isnt terribly accurate in this one, but thats the main point.
The image MB sends in panel three is part of an old program called the "blaster worm". A worm is a type of malware that spreads from computer to computer uninvited, similar to a computer virus. The Blaster in particular was an attack from 2003 that worked on Windows XP. Its only real goal was to be annoying. It'd restart your computer a bunch and delivered that funny message about Bill Gates.
All of them are relatively simple hacks with solutions and easy fixes known today. By the time MB and ART come around, they'd be at least a few hundred years outdated. So theres not a chance that any of these hacks would make it past either of their walls, but they'd probably seem stupid enough in the first place that its insulting that you even wasted the processing power to send it.
Therefore, perfect for robot curse words.