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;
ENVIRONMENT -- Changes or identifies an environment.  The environment is the
               default routine that DEBUG searches when you do not explicitly
               specify one.  ENV is the legal abbreviation for ENVIRONMENT.

  > ENVIRONMENT            (Returns the current environment, which in this
  Stopped at: TEST\f\10     case is TEST\f\10.  If you request information
                            about a variable named x, DEBUG assumes that x
                            is visible from routine f.)

  > ENVIRONMENT MOD1\g\    (Suppose that variable x is not visible from
                            routine f, but is visible from routine g.  Before
                            requesting information on x, you can change the
                            environment to g so that DEBUG can find x.)

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