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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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.