There I can help you. A Non Disclosure Agreement basically is any signed agreement in the form of: "You can work on this, but don't tell anybody about these things you see and do." They are very common when dealing with any bigger companies. You want to develop drivers for this hardware in your new mobile phone? Sure! We want to sell it as you know. We will even give you details about how our hardware works so you can optimize them better. We just require you to sign here, that you do not tell anybody about the hardware, so our rival can not copy the technology. Thats the mindset behind NDAs, and in their basic form they are very justified. Like any legal agreement they tend to get complicated and sometimes bad companies try to exploit that. For example Nvidia recently tried to include a clause which said: that lead to the press leaking the NDA contract and making a scandal out of it. In the full text of the NDA the sentence continues and is not as bad as it sounds.