D channel (Delta channel or Data channel)

• RPR (Resilient Packet Ring)
• RS 1. Recommended Standard
• RS 1. Recommended Standard
• RS-232
• RS-328 (Recommended Standard 328)
• RSA (Rivest-Shamir-Adleman)
• RSS (Really Simple Syndication or Rich Site Summary)
• RSVP (Resource Reservation Protocol)
• RTCP (Real Time Control Protocol)
• RTF (Rich Text Formatting)
• RTM (Ready To Market)
• RTP (Real Time Transport Protocol)
• rt (real-time)
• RTSP (Real-Time Streaming Protocol)
• RTS (Request To Send)
• rt-VBR (real-time Variable Bit Rate)
• rule of thumb
• rule of thumb
• rules of engagement
• rules of engagement
• run-length encoding
• runt
• Rural and High Cost Program
• Rural Health Care Corporation (RHC)
• Rural Health Care Program