Question: How do I find out which executables or processes are using my shared library objects in a Unix environment, specifically the AIX environment. Is there any command for it?

Answer: 
In linux, you would:

```
for i in /usr/bin /bin /usr/local/bin /sbin /...; do
  # edit: bug fix to display which filename has the library
  # the egrep component will extract line with your library
  # or line with ":::", which contains name of the binary
  find /usr/bin -printf '::: %p\n' -exec ldd \{\} \; | egrep 'your lib. name|:::'
done

```

The ldd package for AIX can be found as described [here](http://www.faqs.org/faqs/aix-faq/part4/section-22.html)

To check running processes, you could: lsof | grep 'your library name'. How to obtain lsof for AIX can be found [here](http://www.ibm.com/developerworks/aix/library/au-lsof.html)
Not sure if it will help, but maybe you could [lsof](http://en.wikipedia.org/wiki/Lsof).