What's the difference between named pipe and mailslot ?

What's the difference between named pipe and mailslot ? 4 slot mailbox Metal 4 Slot Industrial Mailbox Wall Storage 4040 t slot aluminium extrusion DOOR IDENTIFICATION Number and name slot with paper cards for field identification of apartment name and tenant number supplied for each tenant door Related

4040 t slot aluminium extrusion Letter Slot Width , 240 Height , 40 BCP 4 Mail Box Bank not quite what you're looking for? check out some of our alternative BCP Single Post,

40 super hot slot free Upgrade to our 4C Horizontal Mailbox with 4 Tenant Compartments and Outgoing Mail Slot Stylish and efficient mail solution for your convenience! Description Classroom Keepers Mail Box measuring 31-58 x 12-34 x 21 inches is provided with 30 slots each measuring 12-12 x 10 x 1-34 inches