How do you disable your laptop from saving account numbers?

i hate that my laptop saves account numbers when i make online purchases. how do i disable this?
How do you disable your laptop from saving account numbers?
Clear the Cookies and the browsing history ...to clear the history in the browser go to tools then internet options delete browsing history. to clear the cookies go to start then run then type "cookies" and hit enter... then highlight the cookies and delete.... wha la... this should help you with that....