Myriad comes to mind …

Or perhaps Frutiger - difficult to tell apart. It's also not clear whether this is a light or regular weight - it almost looks in between. Perhaps generated via a Multiple Master??

Yup, you are right. But some of the curves – especially in the l/c a – made me think of Myriad and not Frutiger. But maybe I'm wrong again.

Frutiger Light. It's a rare occurence, but this time you're wrong. ;^)

Anyway, it's very hard to keep them apart.