Harassment by computer means someone is using the internet or other kinds of electronic communication to say mean or hurtful things to someone else repeatedly. This can include things like sending nasty messages, creating fake profiles to bully someone, or spreading rumors or lies about them. It can happen on social media, through email, text messages, or even in online games. Just like in real life, it's not nice to be mean to others online, and it can make people feel very sad or scared. If someone is being harassed by computer, they should try to talk to a trusted adult or authority figure, who can help them stop the harassment and feel safe again.