that's the one since the dl640 has no square root key.
----- Original Message -----
From: "Harvey Heagy" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Friday, March 09, 2012 8:09 PM
Subject: Re: keys on sharp 620
> Are you speaking of the calculator only without the clock?
> Harvey
>