$READ

   The Read service retrieves a specified number of bytes from
   a file (beginning on a block boundary) and transfers them to
   memory. A Read service using block I/O can be performed on any
   file organization.

                        RAB64 USERS (ALPHA ONLY)

      On Alpha systems, RAB64 can replace the RAB or RAB prefix
      wherever it is used with the Read service on OpenVMS Alpha
      systems.

   Format

     SYS$READ  rab [,[err] [,suc]]
 

Additional information available:

Returns         Arguments       Condition_Values_Returned