suggestion-box（n.）
"locked receptacle to receive private written proposals for change or improvement in an establishment or administration," from suggestion + box (n.1), suggested by 1883:
WHAT funny creatures girls are! I'm sure no one can talk faster than the girls of our mission band when the meeting is out, and yet how hard it is to get them to "speak in meetin'." For this reason we found it good to institute a "Question Box" or perhaps "Suggestion Box" would be a better name. ["Miss M'Gilvary," "For the Young People," in "Woman's Work for Woman," September 1883]
The thing itself was in use by that name by 1889, in libraries (to suggest new books), by 1898 in workplaces (often complaint and suggestion box).
This 'Complaint and Suggestion' box is under lock and key, and Mr. Jacobs carries the key. All complaints that he takes out of this box will be strictly confidential and will be investigated, so you need not fear to make any complaint as long as it is just. The name signed to a complaint will not be divulged. It is only our true friends that will criticise us. ["The NCR," employee publication of the National Cash Register Company, Aug. 1, 1898]
该词起源时间：1883年