1, The full form of NO is Normally Open. It’s used on Academic & Science ,Electrical in Worldwide

Normally open – Is a contact that does not flow current in its normal state.  Energizing it and switching it on will close the contact, causing it to allow current flow.

Normally closed – Is a contact that flows current in its normal state.  Energizing it and switching it on will open the contact, causing it to not allow current flow.

Don’t overthink these two concepts.  That is all there is to it.  Also now is a good time to remind you that this is article is talking about the electrical normally open and normally closed symbols which while may look the same as the ladder logic XIC and XIO instructions, are not the same.

2, The full form of NO is Nitric Oxide. It’s used on Academic & Science ,Chemistry in Worldwide

Nitric oxide is a molecule that’s produced naturally by your body, and it’s important for many aspects of your health.

Its most important function is vasodilation, meaning it relaxes the inner muscles of the blood vessels, causing them to widen and increase circulation.

Nitric oxide production is essential for overall health because it allows blood, nutrients and oxygen to travel to every part of your body effectively and efficiently.

In fact, a limited capacity to produce nitric oxide is associated with heart disease, diabetes and erectile dysfunction.

Fortunately, there are many ways to maintain optimal levels of nitric oxide in your body.

3, The full form of NO is Neos. It’s used on Transport & Travel ,Airline Codes in Italy

Neos (IATA code: NO, ICAO: NOS) is an Italian airline.