Accessing a correct customer quickly from the list of customers requires unique customer identification. You can define the code system that helps you to generate and retrieve the customer, vendor or employees based on the code quickly.
Here is an example of customer Agrolait, the code AGL is generated based on the customer name Agrolait; when you type AGL in Customer field on Sales order or invoice the customer Agrolait will be searched quickly.
It is advisable to create a short code for the frequent customer or supplier and assign into Internal Reference, this will help us search them quickly.