![Icon of two application windows](/https/www.era.nih.gov/themes/era2019/images/s2sicons/testing1.png)
![Icon of clipboard with a checklist](/https/www.era.nih.gov/themes/era2019/images/s2sicons/validations1.png)
Validations
![Icon of folder with graphic image](/https/www.era.nih.gov/themes/era2019/images/s2sicons/img1.png)
Application Images
![Webpage window icon](/https/www.era.nih.gov/themes/era2019/images/s2sicons/webservices1.png)
Services
![Computer with refresh icon](/https/www.era.nih.gov/themes/era2019/images/s2sicons/enhancement1.png)
and Validations
![Warning icon with turning cogswheel gears](/https/www.era.nih.gov/themes/era2019/images/s2sicons/issues1.png)
S2S Applications
Additional Resources
- NIH Application Forms and Activity Code Mapping – FORMS-H (Excel)
- NIH's SF424 (R&R) Application Guides
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