adding key components

thepostalsystemexplained/index.md

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 ## **What is a postal system?**
 
+Before delving into the topic, let's first define the key components of postal systems and the different types that exist.
 
+The main elements of a postal system are as follows:
+
+- *Mail Collection*:
+
+This refers to the process of gathering mail from various sources, such as post offices, mailboxes, businesses, or individuals. It is the initial step, typically occurring once the mail is deposited in a mailbox.
+
+- *Sorting*:
+
+After the mail is collected, it is sorted based on factors like destination, size, and priority. Modern postal systems often employ automated machines for sorting, though manual sorting may still be used for certain items. This is the point where the first potential issues may arise.
+
+- *Transportation*:
+
+Once sorted, the mail is transported to its next destination, whether locally, nationally, or internationally. This process may involve various modes of transport, such as trucks, airplanes, ships, or even bicycles in remote areas. Transportation is another stage where problems can emerge.
+
+- *Delivery*:
+
+Finally, the mail reaches its destination, where postal workers deliver it to the recipient's address. This may be done through home delivery, post offices, or collection points. This is the last stage where complications could potentially occur.
+
+![](postalservices.png)
+
+There are two types of postal systems: 
+
+- *National Postal Systems*:
+
+Each country operates its own national postal system. Examples include the USPS in the United States, Royal Mail in the United Kingdom, and La Poste in France.
+
+- *International Postal Systems*:
+
+International cooperation between different national postal systems facilitates the exchange of mail across borders. For instance, the Universal Postal Union (UPU) plays a key role in coordinating global postal standards, ensuring seamless mail flow between countries.