Normally all variables are prefixed by the module name (program or unit), followed by a dot.
Variables declared in the global sections are internally named as declared, with the module name prefix; variables declared within a procedure or function declaration are internally named:
<module-name>.<procedure-or-function-name>.<variable-name> and cannot be accessed outside.
MyUnit.MyVar is a variable declared in a global section of the MyUnit unit.
MyUnit.MyProc.MyVar is a variable declared in the MyProc procedure in the MyUnit unit.