39 Mail and package forwarding, namely, providing postal delivery services in the nature of forwarding documents, letters, packages, and parcel; warehousing, storage, packing, delivery, and returns with respect to the foregoing, namely, warehousing, storage, and delivery of documents, letters, packages, and parcels; document forwarding and receipt and delivery of documents for others, namely, providing postal delivery services in the nature of forwarding documents, letters, packages, and parcels