When you send email to your boss, you're in cyberspace. You're in
cyberspace when you log into CompuServe or Prodigy, or when you
post an article to USENET news. You're in cyberspace when you
download a nifty utility or an addictive game from a public server or
bulletin board.
In some ways, "cyberspace" is a bad term, because it sounds so mysterious. You're probably not hallucinating when you send an email note