What is a PAC vs. a 527?

[Eric J in MN]

"The MoveOn family of organizations consists of three entities. MoveOn.org, a 501(c)(4) organization, primarily focuses on education and advocacy on important national issues. MoveOn PAC, a federal PAC, primarily helps members elect candidates who reflect our values. And MoveOn.org Voter Fund, a 527 organization, primarily educates voters on the positions, records, views, and qualifications of candidates for public office."

Do PACs have their own number, instead of "527?"

[Eric J in MN]

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