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Spectrum may refer to:
Spectrum was a 1970s British progressive rock band led by Harvey / Steve (?); they are best known for the single “Black Beauty.”
In electronics, a spectrum refers to the distribution of signal power or amplitude across frequency (e.g., a frequency spectrum shown on a spectrum analyzer).
“Spectrum” is the title of a Star Trek television episode.
The Spectrum is a UK-based organization providing services (notably for autism/learning support, depending on the specific entity).