Tablets do not count.
1 Desktop PC (older) as an emergency system and for games of the granddaughter, with Win10,
1 Silent PC, at work, Win10
1 convertible notebook Win10
Are all synchronized with each other, in personal data (once a week).
A Thinkpad T440s for mobile applications e.g. Programming of FU or SPS and a Nettop PC Aufm desk, where I operate my CAD software on it…
An Asus eee-PC (actually should not count - that can't be anything! Dirty thing… But looks chic!)
a Nano PC (self-built), so a miniature tower
a laptop from 1890, which I still like to use for work
a tower, my old gaming PC, which now stands as a media machine in the living room
my PC (self-made - Q-Tron 3000 😁) for daily use