RTS may refer to any of the following:
1. Short for Request To Send, RTS is a signal sent by a communications device, such as a modem, to verify if the other device is ready for data reception.
2. Short for Real Time Strategy, RTS is a computer game in which actions occur immediately rather than giving each player a turn or waiting for an opponent to finish their action. Some examples of RTS games are Age of Empires, Starcraft, Warcraft.