Dear Monk, Sorry, My intention of scratchpad is not that. I read the following context from a link. "Lexical variables (those tagged with my) aren't listed in the symbol table at all. Every block and subroutine gets a list of one or more arrays of variables called scratchpads (typically one, but more if the subroutine recurses). Each lexical variable is assigned one slot from a scratchpad; in fact, different types of variables with the same name - $spud and %spud, say - occupy different slots". In above context I didn't understand about scratchpads. Can anyone please explain about scrathpads on this context?