4 ms·

And how many are based on Debian / Ubuntu? lol.

• pjmlp 3y ago
  During the UNIX wars heyday, except for special ones like Appolo (which used a Pascal dialect) or Tru64/QNX, they were also either based on AT&T UNIX, or the BSD spinoff. A few common bases hardly matter, when every distro is a special snowflake with its own set of incompatible changes.