Similar to モルモン・トレイル

RD-0146

RecordMyDesktop

Red Apollo

MRNA vaccine

Robot Operating System

RPL (programming language)

RPS-420

Northrop Grumman RQ-4 Global Hawk

RS-27A

RS-88

RT-20 (rifle)

Ryzen

Smith & Wesson Model 28

SABRE (rocket engine)

Sikorsky–Boeing SB-1 Defiant

Scholarly Publishing and Academic Resources Coalition

Sd.Kfz. 247

Siemens SD-400 and SD-460

Secure Shell

SES (company)

Shazam (music app)

Shed Skin

Shopkick

Single instruction, multiple data