![Icon of two application windows](https://webarchive.library.unt.edu/web/20201218005925im_/https://era.nih.gov/themes/era2019/images/s2sicons/testing1.png)
![Icon of clipboard with a checklist](https://webarchive.library.unt.edu/web/20201218005925im_/https://era.nih.gov/themes/era2019/images/s2sicons/validations1.png)
Validations
![Icon of folder with graphic image](https://webarchive.library.unt.edu/web/20201218005925im_/https://era.nih.gov/themes/era2019/images/s2sicons/img1.png)
Application Images
![Webpage window icon](https://webarchive.library.unt.edu/web/20201218005925im_/https://era.nih.gov/themes/era2019/images/s2sicons/webservices1.png)
Services
![Computer with refresh icon](https://webarchive.library.unt.edu/web/20201218005925im_/https://era.nih.gov/themes/era2019/images/s2sicons/enhancement1.png)
and Validations
![Warning icon with turning cogswheel gears](https://webarchive.library.unt.edu/web/20201218005925im_/https://era.nih.gov/themes/era2019/images/s2sicons/issues1.png)
S2S Applications
Additional Resources
- NIH Application Forms and Activity Code Mapping - FORMS-F (Excel) (May 2020)
- NIH Application Forms and Activity Code Mapping - FORMS-E (Excel) (December 2018)
- List of Activity Codes Processed Electronically by eRA
- NIH Electronic Multi-project Applications (PDF) (June 2016) – Reference for S2S solution providers
- NIH's SF424 (R&R) Application Guides
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