The conversation between human and AI assistant.
[|Human|] Group the words "pencil," "eraser," "ruler," "compass," and "calculator" into two categories.
[|AI|] Stationery supplies: Pencil, eraser, ruler, compass 

Mathematical tool: Calculator
[|Human|] 
Group the words "pencil," "eraser," "ruler," "compass," and "calculator" into two categories.