A computer that the school sends you.
What you are bound to get in a school computer:
Bad Antivirus software
Extremely strict parental controls
The inability to download anything
An old integrated graphics card
The desire to buy a more powerful PC and then break your school computer over one of the teachers' heads
The desire to force the school to pay for said PC
"Uggh, this school computer is shit. I can't even change the background"
"Dude, I feel your pain. "
"Fuck this piece of shit. I'm gonna go save up for a better computer"
"Yeah, me too."