So, what sponsor songs do we have?

There are a few songs in the OST which are clearly about a sponsor in particular.

- [Overdog is about Engimo. ](https://youtu.be/H5nCMLHfBeg?feature=shared) Lyrics start midway through.

- [C'est Absurde is about ISEUL-T.](https://youtu.be/Bw7ZHgEvncU?feature=shared). I'll mention [ABSORBE](https://youtu.be/bI9ipO6UAhI?feature=shared) as well which is also about the same sponsor.

So I was wondering, do we have official themes for other sponsors? For example, which song would be CNS' theme? Holtow's?