call back unit
A device that, after you connect with a BBS and tell it who you are, will then call your phone number. This is used to make a very secure system to prevent hackers from invading a system. It then becomes very difficult, if not impossible, for a hacker to get into the computer system.

Dictionary of telecommunications. . 2000.

Look at other dictionaries:

  • Call of Duty: World at War — North American cover Developer(s) Treyarch Certain Affinity (some multiplayer maps a …   Wikipedia

  • Call of Duty (video game) — Call of Duty Windows cover Developer(s) Infinity Ward Publisher(s) Activis …   Wikipedia

  • Call of Duty 3 — Developer(s) Treyarch Publisher(s) Activision Designer(s) …   Wikipedia

  • Unit 669 — is an Airborne Rescue And Evacuation Unit ( he. יחידת החילוץ והפינוי בהיטס, Yechidat Hilu z Vehat zala Behethes ), which is the name of the Israeli Air Force elite heliborne medevac extraction unit. [cite press release |publisher = Asia Times… …   Wikipedia

  • Back Burners — Infobox The Wire episode caption = episode name = Back Burners episode no = 32 epigraph = Conscience do cost. Butchie teleplay = Joy Lusco story = David Simon and Joy Lusco writer = director = Tim Van Patten guest star = see below prod code = 307 …   Wikipedia

  • Call of Duty: Black Ops — Box art Developer(s) …   Wikipedia

  • UNIT dating controversy — The UNIT dating controversy is an ongoing debate in Doctor Who fandom, concerning exactly when the stories featuring the fictional military organization known as United Nations Intelligence Taskforce or more recently as the Unified Intelligence… …   Wikipedia

  • Call of Duty: Modern Warfare 2 — MW2 redirects here. For the MechWarrior game, see MechWarrior 2: 31st Century Combat. Call of Duty: Modern Warfare 2 …   Wikipedia

  • Call of Duty 4: Modern Warfare — For the Nintendo DS game, see Call of Duty 4: Modern Warfare (Nintendo DS). Call of Duty 4: Modern Warfare Developer(s) Infinity Ward …   Wikipedia

  • Call of Duty: Modern Warfare 3 — MW3 redirects here. For the 1999 video game, see MechWarrior 3. Call of Duty: Modern Warfare 3 …   Wikipedia

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”