a full-size sport-utility vehicle that was built by General Motors.

The Kia K5, formerly known as the Kia Optima, is a mid-size car manufactured by Kia since 2000 and marketed globally through various nameplates.

The Krupp K5 was a heavy railway gun used by Nazi Germany throughout World War II.

The K5 is AMDs first x86 processor to be developed entirely in-house.

The Daewoo Precision Industries K5 or K5/DP51 series is a 9×19mm semi-automatic pistol produced by SNT Motiv (formerly S&T Daewoo) of South Korea.