Similar to 蒲原鉄道の車両形式

Raven Software

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

SABRE (rocket engine)

Sikorsky–Boeing SB-1 Defiant

Scholarly Publishing and Academic Resources Coalition

Sd.Kfz. 247

Secure Shell

Server Name Indication

SES (company)

Shazam (music app)

Shed Skin

Shopkick

Single instruction, multiple data