RTS/CTS (request to send/ clear to send) may refer to:
* Request to Send and Clear to Send,
flow control signals
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RS-232 RTS/CTS
In telecommunications, RS-232 or Recommended Standard 232 is a standard originally introduced in 1960 for serial communication transmission of data. It formally defines signals connecting between a ''DTE'' (''data terminal equipment'') such a ...
, today's usual RS-232 hardware flow control
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IEEE 802.11 RTS/CTS, wireless networking protocol flow control
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