ppt.
The abbreviation for the word power is "PWR."
"GPA" is already an abbreviation for "grade point average". There is no further abbreviation for the abbreviation.
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Pt
pt.
The abbreviation for "before noon" is "AM." It is the abbreviation for the Latin phrase ante meridian which means "before the high point (of the sun)"Similarly, "PM" is the abbreviation for the Latin post meridian, meaning "after the high point"
Grade Point Average
poa
billionth or 10 to the 9th power
Grade Point Average
It is the power of negative 6.
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