About the compiler directives.
   {$B.}      Boolean Evaluation
   {$D.}      Debug Information
   {$F.}      Force Far Calls
   {$I.}      Input/Output Checking
   {$L.}      Link Buffer
   {$N.}      Numeric Processing
   {$R.}      Range-Checking
   {$S.}      Stack Overflow Checking
   {$T.}      TPM File Generation
   {$V.}      Var String Checking
              Parameter Directives