Reading some of the stories about users finding mention of cURL in software acknowledgements and emailing for support makes me think that there is a Group C that could easily be confused
Ironically I discovered it yesterday when using it to trigger outbound Twilio voice calls from a Windows desktop (for testing the local Lync client). The Windows binary has the logo.
(Off-topic, gotta change from ' to " for the example code to work on Windows. I should mention that to Twilio...)