  Meaning of TT and SYS$INPUT? 
 The Question is:
 
What is the logical TT used for in the following part of my login.com file:
 
$ ASSIGN/NOLOG TT SYS$INPUT
 
 
 The Answer is :
 
  Someone is redirecting I/O, and through a moderately ugly means.
 
  TT is your login terminal when an interactive process, while sys$input
  is the terminal (for interactive processes) and the command procedure
  (for DCL command procedures, whether an interactive process or batch
  or otherwise).  Non-interactive processes do not have a TT device.
 
  This command may well produce subsequent errors for non-interactive
  modes -- the OpenVMS Wizard might guess you are seeing unspecified
  errors, given that the discussion was raised here.
 
 Answer written or last revised on  17-DEC-2003 
