Similar to WebAssembly

Quite Universal Circuit Simulator

Raspberry Pi Foundation

Raven Software

RBK Daily

RCD Espanyol (women)

Re-Logic

ReachNow

Recuva

Red Pitaya (computer)

Riak

RocksDB

Roslyn (compiler)

RPCS3

Assembly language

Machine code

WDC 65C816

Amiga

EDSAC

IBM 650

IBM 701

Java bytecode

Lotus 1-2-3

PC-8800 series

VIC-20

ZX Spectrum

Atari ST