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Did you know that the Dutch rail company is called NS or is that just a coincindence?

NS is the NeXTSTEP class prefix in ObjC, I doubt they're doing anything more than copying that. They shouldn't.

Actually, NX is the NeXTSTEP class prefix.

The NS classes were introduced as part of OPENSTEP, which leads some people to suggest that NS = NeXT + Sun.

> The NS classes were introduced as part of OPENSTEP

This is incorrect - the NS prefix was introduced in NEXTSTEP along with EOF.