Conversation so far:
Who is the person who types in court
A stenographer is actually a trained transcriptionist, meaning they record spoken word into written copy; and they do it fast.
what do stenograpgers use to type
Stenographers, court reporters & transcriptionist use a specialized keyboard called a stenograph machine which has fewer keys than a conventional alphanumeric keyboard.

Question: how does the machine work
Self-contained rewrite: how does the stenograph machine work