A Contract Postal Unit (CPU) is a retail postal facility located inside a retail establishment, such as supermarkets, card and gift shops, pharmacies, and colleges. CPUs are operated by the retailer's employees and offer the same basic services available at a regular Post Office. The Village Post Office (VPO) concept was introduced earlier this year and is similar to the CPU in that they are retail postal facilities operated by community businesses. However, they provide limited postal products and services. CPUs and VPOs lower U.S.