Not to my knowledge. In “official” terminology an indexer is a process that fills a search engine’s database with the stuff it’s crawler finds. Easily possible that some usenet provider calls their (or some third party’s) newsreader an “indexer” to make it sound more important. Marketing speech is full of neologisms like that.
Is a newsreader the same thing as an indexer?
Not to my knowledge. In “official” terminology an indexer is a process that fills a search engine’s database with the stuff it’s crawler finds. Easily possible that some usenet provider calls their (or some third party’s) newsreader an “indexer” to make it sound more important. Marketing speech is full of neologisms like that.