Student or Learner
I know what is hacker.
Is the following writing correct?
Hacker is one who hacked others' email system.
You should be aware that the association of 'hacking' with email (and even voice-mails) is a response to a very recent set of revelations. Computer hackers were hacking into systems (gaining illicit access] long before email was invented - and even longer before voice-mail was.