In facsimile, a frequency modulationsystem where one frequency represents picture black and another frequency represents picture white[?]. Frequencies between these two limits may represent shades of gray
An intentional frequency change used for modulation purposes
... name of several Egyptian pharaohs:
Ramses I[?]
Ramses II ("The Great")
Ramses III
Ramses IV[?]
The name means "Child of the Sun".
This is a disambiguation ...