1985 B. Sterling Schismatrix № 26: I've met many borderline posthumans in my day, but never one of you.
1986 D. Moffitt Second Genesis № 321: Humans and posthumans drew closer together to share an ancient tribal comfort.
2003 A.M. Steele Madwoman of Shuttlefield Asimov's SF (May) № 70: A Savant: a posthuman who had once been flesh and blood until he'd relinquished his humanity to have his mind downloaded into cyborg form, becoming an immortal intellect.
2004 D. Broderick X, Y, Z, T № 11: These are the exotic places and states humans might enter, even if we begin by paving the earth over and remaking ourselves into posthumans.