The term 'Notary Public's Device' can be summarized as a STAMP, which is a five-letter word. A notary public is an official appointed by the government to witness the signing of important documents and administer oaths. The notary public's device is a STAMP that they use to authenticate documents. This STAMP is typically a rubber STAMP with the notary's name, signature, and seal. It is used to certify that the document has been properly signed and witnessed.