This content type stores single units. If you manage a hotel for example, your units could be named room #1, room #205, suite 3C, etc. It is up to you, how you name your units.

Each unit needs to have a unit type assigned. And each unit can be assigned to only one unit type (for example: room #1 can be assigned in the system to be of type single or room, but not both). In the same way each unit type can be assigned to one category as stated above.