[iMore.com]

If you browse the web a lot on your iPhone or iPad, you can start accumulating a decent sized web history or lots of stored passwords that you may not want saved. Perhaps an iPad in your home is shared between more than one person and you don't want others having access to your accounts or your history. Luckily, you can easily clear it out in just a few seconds, here's how:

Full story from the iMore Blog...