1 READ 

        READ [/RELOCATE=expression]  file-spec
	     [/EXECUTIVE]  directory-spec

    Copies global symbols from an object module to the SDA symbol table.
    The READ command lets you extract global symbols from any object
    module and insert the definitions into the SDA symbol table.  If you
    do not specify a file type, .STB is used by default.

    The following MACRO program can be used to obtain symbols in addition
    to those in SYS.STB:

	.TITLE	GLOBALS
	$PHDDEF	GLOBAL		; Process header definitions
	$DDBDEF	GLOBAL		; Device data block
	$UCBDEF	GLOBAL		; Unit control block
	$VCBDEF	GLOBAL		; Volume control block
	$ACBDEF	GLOBAL		; AST control block
	$IRPDEF	GLOBAL		; I/O request packet
	; more can be inserted here
	.END

    Use the command below to generate an object module file containing 
    the globals defined in the program.

	$ MACRO GLOBALS+SYS$LIBRARY:LIB/LIBRARY /OBJECT=GLOBALS.STB

2 /RELOCATE=expression

    Change the relative addresses of the symbols to absolute addresses,
    by adding "expression", the base value, to each relative address
    in the object module.  This qualifier changes those addresses 
    to absolute addresses in the address space into which the dump is 
    mapped.

2 /EXECUTIVE directory-spec

    Reads the symbol tables from the executive loaded images (which can
    be displayed with the SHOW EXECUTIVE command).