The definition of socialism isn't the same as the old textbooks, it's not just state control of means of production. Citizens have to look at the size of government, it's intervention in the economy and individuals lives, and in particular as I've learned in Canada; covert "control" of companies.
If you open up an IBM office in Toronto or London, and the covert police are tampering with Human Resources, putting their patsies in positions of management and executive, that's socialism in 2019. They don't need to overtly control the business, in fact, that's nt even ideal, it's all about manipulating employees within the company and treating the company as their personal playground. Dirty and deceptive.
America is about competition and free market, socialism today is Fiefdoms. You are born into government, you've got it made, if not, you will be born and die poor. This is the Canadian system today. It's not based on competition or best and brightest, it's sheer exploitation of shareholders and foreign businesses.
I suspect the Scandinavian system is similar and I'm quite confident England operates precisely like this. How many others? Impossible to know, it's all covert. The general indicator should be "how many State run services, meddling, regulations and operations exist?" I would guess the more they possess, the more it is broadly used in the nation.
THIS is socialism. The more government control and access you provide, the worse the intrusion in your life and economy. The more control you relinquish, it's a guarantee.