CA stores and programs

Windows

https://social.technet.microsoft.com/wiki/contents/articles/31633.microsoft-trusted-root-program-requirements.aspx

Android

Cf. https://www.chromium.org/Home/chromium-security/root-ca-policy

Chrome

https://www.chromium.org/Home/chromium-security/root-ca-policy

Apple

https://www.apple.com/certificateauthority/ca_program.html

Firefox / Mozilla

https://www.mozilla.org/en-US/about/governance/policies/security-group/certs/policy/

Debian / Ubuntu

https://tracker.debian.org/pkg/ca-certificates

https://launchpad.net/ubuntu/+source/ca-certificates

Java (Oracle's Java SE Root CA Program)

https://www.oracle.com/technetwork/java/javase/javasecarootcertsprogram-1876540.html

CABForum

Baseline Requirements: https://cabforum.org/baseline-requirements-documents/