"A"
"B",
"C",
"D",
"E",
"F",
"G",
"H",
"I",
"J",
"K",
"L",
"M",
"N",
"O",
"P",
"Q",
"R",
"S",
"T",
"U",
"V",
"W",
"X",
"Y",
"Z",
XCO: Abbreviation for a Crystal controlled oscillator. An oscillator which uses a crystal to control the oscillation frequency.
XO: Abbreviation for crystal oscillator. [Crystal Oscillator Manufacturers]
X-RAY EMISSION: Penetrating radiation similar to light, but with shorter wavelength, that can
penetrate human tissue.
