25 or 6 to 4 by Chicago. What does it mean?


I just downloaded the new HD of the remix of Chicago ll .

I have heard the song 25 or 6 to 4 numerous times, what does it mean?.

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The thing about "horn bands" is that, since the horn players are full members of the band, it is apparently felt that they must play on every song, whether or not the song benefits from them doing so. Whereas The Beatles in their later years would occasionally have a song part played by a horn (Penny Lane, Savoy Truffle, etc.) for a musical reason, horn bands have to give the horn players something to play on every song. I don't care for that concept. I felt the same way about the string players in ELO. It's putting the band members before the music itself, rather common in Rock music, imo.
joe crowe, you're better informed than me, so i appreciate your input. what i'm trying to convey is that unlike the excrable bs&t, the early chicago was kind of interesting and punk--the horns were sort of a disciplined counterpart to the wild guitar and bass. plus the singers were sort of off-key-but-good in a white guy with soul sort of way.
The Terry Kath years were pivotal for this band. We music lovers are left w/ a treaure of catalog material. CTA, specifically, is one of the most important debut albums of the Rock era.
I thought I heard once it was about getting drubbed in a softball game.  Would have been that big ball in a gloveless game in Chicago.