Yes there are so many - esp. with school systems.
DISD- Dallas Independent School District
TISD - Tyler Independent School District
LISD- Lindale, Lewisville, or even Lubbock Independent School District(s)

I was once traveling SW of Tyler and went through a town called Palestine. I bet the teachers get a real kick when people ask them "Where do you teach" ? . . why PISD where else ? grin
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David (OFI)