Knoo - lead
- Knoop indentor
- knot
- knot area ratio method
- knot hole boring and patching machine
- knots
- Knott's method
- know how
- know-how
- knowledge acquisition
- knowledge based maintenance
- knowledge based vision
- knowledge box
- knowledge eliciation
- knowledge engineer
- knowledge engineering
- knowledge of the invention
- knowledge-based management and control
- knowledge-based method
- knowledge-based system
- knowledge-based systems
- Knoy's formulas
- knuckle
- knuckle bending
- knuckle post
- knurdle
- Kodak Photo Resist
- Kodak's Resifax
- Kodapak
- Koehler illumination
- Koiter’s general postbuckling theory
- Kolter's theorem
- komatiite
- Kondon
- König's triad
- Koppers-Totzek process
- KORF process
- Korn and Friedrichs inequalities
- Kornberg enzyme
- Kosmostir-Magnetogyr stirring process
- kp
