Calculate Linux: Gentoo, but for businesses
Linux distros come and go all the time, which tends to imply that anything that continues for years has something going for it. Calculate Linux isn't well known in the West but this is the 13th major release.
Calculate Linux 23 appeared just three days before the end of last year so its version number – which indicates the year of release – is not completely accurate, but it's close enough for government work. Calculate is a whole family of related distros that has been around since 2007.
The product family is quite complex, with abbreviations denoting each variant. There are three editions: Desktop (CLD), Directory Server (CDS), and "Scratch". The last of these is a minimal version for the user to configure as they wish, and comes in both Desktop (CLS) and Server (CSS) version.
The Reg FOSS desk was already getting confused by the abbreviations, but we have barely begun. The Desktop flavor comes in five variants: the original KDE (CLD), Cinnamon (CLDC), LXQt (CLDL), MATE (CLDM) and Xfce (CLDX). In addition, there's a new tool, the Calculate Container Manager, which has its own abbreviation (CCM) but doesn't seem to have its own product page on the company's website.