Student or Learner
hello! what does "that" refer to in this sentence?
"In fact, some features that were at one time available on only mainframes have been adopted..."
Sorry folks, that'that' isn't a subordinating conjunction; it would be in a context like 'He said that they were at one time available...'. In the context given in the OP, it is, as bhai said, a relative pronoun. There should be the tag :mea-maxima-culpa: