The term "post-digital" was coined in 2000 for electronic music, but reflecting on larger developments in technology and culture, to describe a perspective on digital information technology that is no longer focused on technical innovation or improvement. In the meantime, "post-digital" has acquired new meanings and uses, from neo-analog tendencies in art and design to everyday commodification of digital devices to critical revisions of network culture after Edward Snowden's disclosures of Internet surveillance. In all cases, "post-digital" boils down to a revision of "new media" as defined by Lev Manovich. This essay summarizes these different meanings and uses with a particular focus on media, arts and popular culture, concluding that both techno-positivist "digital" and techno-revisionist "post-digital" cultures are driven by desires of agency.