In Zoho CRM I have choice of product category.  Eg. Software, Hardware, Services.  I know I can add more categories.  But I would like to add child and grand child categories under each.  Eg. Hardware > End user device > Laptop

Or Hardware > Server > 

SW > Application > Backup >

SW > Application > Design

Can I do that?  How deep can I go?  I would prefer to go 4 - 5 levels