Was I Robot by Isaac Asimov originally a short story or novel?

"I, Robot" by Isaac Asimov was originally a collection of nine short stories that were published individually between 1940 and 1950.

Later, in 1950, these stories were compiled and published as a novel with an introductory framing story to connect the individual tales.

So, "I, Robot" is both a collection of short stories and a novel, depending on how you view it.