I think we find QNX supplying an OS for one of RIM's new (and old?) products.
The layers may go beyond that.
Sorry, but we routinely delete invitations to participate in research projects by answering questionaires. So I deleted you post, even if it didn't contain any link to such a site (only to your portfolio site, which can be considered non-relevant site promotion which isn't allowed.
May I make a remark about your list of 'providers of operating systems' in your post:
- Google Android
- Windows Mobile / Windows Phone and
To me, it's doubtful you'll pass your exam if you make such erroneous and unsystematic lists. These are 2 companies (RIM and Apple), 2 OS's (well, 3 in fact, Windows Mobile and Windows Phone are different) and 1 combination of a company and an OS (Google Android). So it isn't a "list of providers of OS'es".