| .rtf |
Rich Text Format File |
| .reg |
Registry File |
| .rdp |
Remote Desktop Configuration File |
| .rels |
Open Office XML Relationships File |
| .resx |
.NET Managed Resources File |
| .rwz |
Outlook Rules Wizard File |
| .rc |
Resource Script |
| .rge |
Entourage File Archive |
| .rbs |
Windows Installer Rollback Script |
| .rbf |
LEGO MINDSTORMS EV3 Robot Brick File |
| .rtc |
Live Meeting Connection File |
| .rll |
Microsoft Resource Library |
| .ruleset |
Visual Studio Code Analysis Rule Set File |
| .rct |
Visual Studio Resource Template |
| .rdlc |
Visual Studio Client Report Definition File |
| .resources |
Visual Studio Resource File |
| .regtrans-ms |
Registry Transaction Log File |
| .rpmsg |
Outlook Restricted Permission Message |
| .resw |
Windows Resources File, Silverlight Applications resource file |
| .rdlx |
Power View Project File |
| .rs |
Rust Source Code File |
| .rc2 |
Visual Studio Resources File |
| .resjson |
Windows JavaScript Resources File |
| .rwd |
NRG Raw Wind Data File |