# Virtual Series - Introduction

Module: Business Booking Engine
Module slug: business-booking-engine
Source URL: https://helpcentre.shipsy.io/en-US/shipsy/article/2sAx20_6-virtual-series-introduction
Article ID: 2sAx20_6
Breadcrumbs: Business Booking Engine > Virtual Series > Virtual Series - Introduction

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Virtual series are the pre-defined set of reference numbers/inventories, allocated to customers for booking.

We may check the available inventory for any given customer, following the steps below:

* Go to Setup → Customer → Customer Management

  ![image.png](/kb-images/virtual-series-introduction--2sax20_6/img_001_64ccb2b75f.png)
* Search the desired Customer → click on Virtual series icon on the right side menu:

  ![image.png](/kb-images/virtual-series-introduction--2sax20_6/img_002_6dacfa565e.png)
* Clicking on Virtual series opens up a new pop-up window as (which shows all the active allotment that exists for the customer (with the following details-Service Type, Start/End ref no. of the series, the Next available no. of the Series, Date Of Issue, Item Code, Series Type):
* User with permission can also delete the inventory from this page (either bulk/single):

  ![image.png](/kb-images/virtual-series-introduction--2sax20_6/img_003_d6364839f7.png)