A post box, also known as a mailbox or letterbox, is an essential tool in sending and receiving mail. However, there are also countless other terms that can be used to refer to this familiar object. Some regional synonyms include "post office box," "drop box," and "parcel box." Other colloquial terms for post boxes include "mail drop," "post office drop-off," and "mailbox center." There are also various technical terms associated with post boxes, such as "collection box," "receptacle," and "mail chute." Regardless of the term used, all of these refer to the same item- a box placed for the purpose of collecting or delivering mail.