I think it originated with the Lisa. It's mentioned in that context on folklore.org (1):
> Lisa users never dealt with Lisa applications directly (these were called tools in Lisa parlance) but instead always manipulated stationery pads which produced documents.
> Lisa users never dealt with Lisa applications directly (these were called tools in Lisa parlance) but instead always manipulated stationery pads which produced documents.
(1) https://www.folklore.org/ProjectView.py?project=Macintosh&in...