As of this week, there are 80,000,000 scholarly items registered with Crossref!
By the way, we update these interesting Crossref stats regularly and you can search the metadata.
The 80 millionth scholarly item is [drumroll…] Management Approaches in Beihagi History from the journal Oman Chapter of Arabian Journal of Business and Management Review, published by Al Manhal in the United Arab Emirates.
There have been loads of changes since Wiley registered “Designer selves: Construction of technologically mediated identity within graphical, multiuser virtual environments” with the DOI https://doi-org.turing.library.northwestern.edu/10.1002/(SICI)1097-4571(1999)50:10<855::AID-ASI3>3.0.CO;2-6), which happens to have been Crossref’s first official DOI (after many prototype deposits).