"In X10, "cut buffers" were introduced."
- See e.g. wikipedia:X Window System#Origin and early development (unfortunately does not mention "cut buffers", so can't be used as a reference). -- Lahwaacz (talk) 16:01, 20 December 2015 (UTC)
Is there a reason xclipboard is not mentioned? It seems at least as important as xsel and xclip to me.