Nm

nm
Abbreviation of nanometer as nm, unit of length equal to 10-9 metres, and equal to 10 (Angstroms).
Nm
Abbreviation of newton metre, the SI unit of Torque.
N-MOSFET
In a MOSFET device the gate is insulated from the channel by a very thin (typically less than the wavelength of light) layer of glass (silicon dioxide) and the gate is either metal or doped silicon (polysilicon), hence the acronym metal-oxide semiconductor.