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Interactive Ruby Shell

International Image Interoperability Framework

Io uring

JavaScript engine

Jekyll (software)

JetBrains MPS

JPEG XL

JSHint

JSON Meta Application Protocol

Kernel.org

1947 KLM Douglas DC-3 Copenhagen disaster

KN-23

K·p perturbation theory

Limited-memory BFGS

LastPass

Launchpad (macOS)

LDAC (codec)

LibreCAD

LIRC

LLDB (debugger)

Local 58

Lotus Improv

LWRC M6

Lzip

12-inch MacBook

Macintosh Quadra 630

Macintosh LC family

Magisk (software)