What does RIOT stand for?

RAM Input/Output Timer

Real-time Input/Output Terminal (SAUS)

Real-Time Input-Output Transducer - or Translator - Computer science

Real-time Input/Output Translator (SAUS)

Remote Independently-Operated Transceiver

Remote Input/Output Terminal - Computer science

Resolution of Initial Operational Techniques

Retrieval of Information by On-Line Terminal - Atomic Energy Authority - Computer science - British