Postal slots are an important part of the USPS system. When an order is placed, the postal service notifies the vendor that an order has been placed.
The vendor then notifies the customer that their order has been placed. Once the customer has received their order and inspected it for any defects, they then place the order in with the USPS.
Slots are a very important part of the postal service. They are used to process orders.
At any given time, there are a certain number of slots open that can be used to process orders. This means that if an order needs to be processed quickly, it can be processed through a slot.
There are different types of slots that can be used for different purposes. Some slots can be used to process orders quickly, while others can be used to process orders that need to go through a more rigorous inspection.
The conclusion is that postal slots are an important part of the USPS system and they are used to process orders quickly.