KP4
KP4, Kp4 or kp4 may refer to
- Witness (Katy Perry album), the fourth album released by Katheryn Elizabeth Hudson under the stage name Katy Perry and her fifth album overall
- Prism (Katy Perry album), the fourth album by singer Katheryn Elizabeth Hudson who uses the stage name Katy Perry
- Killer toxin Kp4 family, a family of killer toxins, which includes the Kp4 killer toxin from the smut fungus Ustilago maydis
- KP4 an amateur radio call sign assigned to operators in Puerto Rice, see Amateur radio licensing in the United States#Call signs
This disambiguation page lists articles associated with the title KP4.
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