So, does anyone know where the initialism "RHPC" comes from?

I've seen enough people using "RHPC" to refer to RHPS on the Internet that I don't think it's just a one-time mistake, but I can't find any information as to why they're doing so. Is it a typo that spread out and turned legitimate via repeated usage? Is it an inside joke? Or does the C actually mean something specific?

I know my question is weirdly arbitrary, but I am very bored and slightly drunk and this is therefore the most important thing in the world to me right the fuck now.