core_io is used at run time in 10 crates (of which 4 optionally). It is a direct run-time dependency in 7 crates.

Depender (with downloads and own rev deps) core_io version
24K 12 fatfs optional ^0.1
7.1K 7 fscommon optional ^0.1
1 enclave ^0.1
bincode_core ^0.1
1 byteorder_core_io ^0.1
rad1o-firmware ^0.1
1 bincode-no-std ^0.1.20180307