EnterpriseSpeak for "If you tell anyone what we're about to show you, we chop off your favourite limb."
If you see something, don't sign an NDA for it, because then anything you try and do in relation to that product in future, like perhaps build a DeviceDriver for it, will get you deeply in the poo.
Some companies use NonDisclosureAgreements derived from the US military. These are mainly companies who do enough military contracting to make it worth enforcing guidelines company-wide. These are typically non-terminating NDAs which last for the lifetime of the employee.
Example: 
Google's NDA
3 pages link to NonDisclosureAgreement:
