Eau de Toilette - perfume/cologne.

https://en.wikipedia.org/wiki/Eau_de_toilette

Radar is Apple's internal bug tracker - "a radar" is an Apple(tm) bug report.

https://openradar.appspot.com/page/1

Odd thing to acronymise. (If you insist on doing so, it should probably be EdT or simply ET in any case).

I don't insist but the acronyms EDT and EDP are already the subcultural jargon. (I'm new to this scene myself.)

Wait, which subculture?