JK

JEDEC (Joint Electron Devices Engineering Council)

JPEG (Joint Photographic Experts Group)

Kb (kilobit) 1,000 bits

KB (kilobyte) 1,000 bytes

KHz (kilohertz)

Kib (kibibit) 1,024 bits

KiB (kibibyte) 1,024 bytes

KVAR (kilovolt-amperes-reactive)

KVM (keyboard, video, mouse)

KW/KVA (working power/apparent power)