Hi,

"I worry about my child and the Internet all the time, even though
she's too young to have logged on yet.  Here's what I worry about. I
worry that 10 or 15 years from now, she will come to me and say
'Daddy, where were you when they took freedom of the press away from
the Internet?'"
                      --Mike Godwin, Electronic Frontier Foundation

From The Jargon File, version 4.4.7

handle

    1. [from CB slang] An electronic pseudonym; a nom de
   guerre intended to conceal the user's true identity.
   Network and BBS handles function as the same sort of simultaneous
   concealment and display one finds on Citizen's Band radio, from which the
   term was adopted.  Use of grandiose handles is characteristic of
   warez d00dz, crackers,
   weenies, spods, and other
   lower forms of network life; true hackers travel on their own reputations
   rather than invented legendry.  Compare nick,
   screen name. 

    2. A magic cookie, often in the form of a
   numeric index into some array somewhere, through which you can manipulate
   an object like a file or window.  The form file
   handle is especially common. 

    3. [Mac] A pointer to a pointer to dynamically-allocated memory; the
   extra level of indirection allows on-the-fly memory compaction (to cut down
   on fragmentation) or aging out of unused resources, with minimal impact on
   the (possibly multiple) parts of the larger program containing references
   to the allocated memory.  Compare snap (to snap a
   handle would defeat its purpose); see also 
   aliasing bug, dangling pointer.