What does ETF stand for?
ETF stands for "Energy, Time, Frequency"
How to abbreviate "Energy, Time, Frequency"?
"Energy, Time, Frequency" can be abbreviated as ETF
What is the meaning of ETF abbreviation?
The meaning of ETF abbreviation is "Energy, Time, Frequency"
What does ETF mean?
ETF as abbreviation means "Energy, Time, Frequency"