Let me have a go at the current rules of:

> **In:** computer hardware, computer software, or personal and home computer networking.
>
> **Out:** electronic devices, media players, cell phones or smart phones, except insofar as they interface with your computer.

I would suggest something like:

> **In:** Computer technology and computer hardware, software, networking and
> auxiliary devices, but only in relation to end-users.
>
> **Out:** Special-purpose electronic devices such as media players and phones,
except when networked to computers or running a general-purpose operating system
> (such as routers or Embedded Windows).