1. A1 sd bench.
http://a1dev.com/sd-bench/
2. Access control list.
https://en.wikipedia.org/wiki/Access_control_list
3. Acl open source community.
http://savannah.nongnu.org/projects/acl
4. Antutu benchmark.
http://www.antutu.com/en/index.htm
5. Aosp.
https://source.android.com/