Internal Program Version: AIO  0.3.112

The Linux-native asynchronous I/O facility ("async I/O", or "aio") has
a richer API and capability set than the simple POSIX async I/O
facility. This library provides the Linux-native API for async I/O. The
POSIX async I/O facility requires this library to provide
kernel-accelerated async I/O capabilities, as do applications that
require the Linux-native async I/O API.

http://kernel.org/pub/linux/libs/aio