PO3
PO3 may refer to:: *Phosphite *Petty officer third class * PO3: an EEG electrode site according to the 10-20 system * A videogame character from Inscryption ''Inscryption'' is a 2021 roguelike deck-building game developed by Daniel Mullins Games and published by Devolver Digital. Directed by Daniel Mullins, it was originally released for Windows on October 19, 2021, and on Linux, macOS, PlayStation 4 ...

Petty Officer Third Class
A Petty officer third class is a non-commissioned officer in some navies and coast guards. By country United States Petty officer third class is the fourth enlisted rank in the United States Navy, U.S. Navy and the United States Coast Guard, U.S. Coast Guard, above Seaman (rank), seaman and below petty officer second class, and is the lowest rank of non-commissioned officer, equivalent to a corporal in the U.S. United States Army, Army and United States Marine Corps, Marine Corps. Petty officer third class shares the same Uniformed services pay grades of the United States, pay grade as senior airman in the United States Air Force, Air Force, which no longer has an NCO rank corresponding with Uniformed services pay grades of the United States#Enlisted, E-4. Specialist (rank), Specialists in the United States Army, Army are not recognized as NCOs either, even though they are also in the E-4 pay grade. History Unlike seaman and lower ranks, a sailor's advancement to petty office ...
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Phosphite
The general structure of a phosphite ester showing the lone pairs on the P In organic chemistry, a phosphite ester or organophosphite usually refers to an organophosphorous compound with the formula P(OR)3. They can be considered as esters of an unobserved tautomer phosphorous acid, H3PO3, with the simplest example being trimethylphosphite, P(OCH3)3. Some phosphites can be considered esters of the dominant tautomer of phosphorous acid (HP(O)(OH)2). The simplest representative is dimethylphosphite with the formula HP(O)(OCH3)2. Both classes of phosphites are usually colorless liquids. Synthesis ;From PCl3 Phosphite esters are typically prepared by treating phosphorus trichloride with an alcohol. For alkyl alcohols the displaced chloride ion can attack the phosphite, causing dealkylation to give a dialkylphosphite and an organochlorine compound. The overall reaction is as follows: :PCl3 + 3 C2H5OH → (C2H5O)2P(O)H + 2 HCl + C2H5Cl Alternatively, when the alcoh ...
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10-20 System (EEG)
10-20 system may refer to: * 10-20 system (swimming safety), a technique used by lifeguards * 10-20 system (EEG), an electrode placement method used in electroencephalography systems {{Disambiguation ...
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