Originally used to refer to someone who likes to examine computer program and operating codes, hacker is now commonly accepted to mean anyone who breaks into computer systems without the permission of the owner.
This occurs when a computer stops responding or “crashes.”
The process by which spammers use specially designed software to collect email addresses from websites. The objective is to add these email addresses to a spam database, then sell that database to other spammers, or send out spam emails to that database. A way of avoiding having your email addresses harvested is to use email forms.