I would suggest that c-programming is completely unnecessary. As every question on the site should be programming related, c should suffice. For the nonce, I have retagged all three questions bearing c-programming.
I am less certain about unix-programming. There are currently over 50 question tagged this way, and I can see an argument that it differentiates between questions about using Unix for programming and those about programming to the Unix API. None-the-less, I think that this argument is weak (we don't have mac-programming, and windows-programming has only 7 questions).
So far (September 25, 2009):
- 7 up votes
- 2 down vote
- 1 suggestion (4 net votes) to merge c-programming with c and the various OS-programming tags with the plain OS tags.
- 1 suggestion (2 net votes) to kill c-programming, but keep the OS-programming tags
- 1 suggestion (0 net votes) to leave well enough alone.
A trend may be emerging, but still not much passion here, and I will take no further action unless and until a stronger consensus develops.