Set column to only allow certain codes???

B

Buttercup

In my spreadsheet, I would like to set a column so that it will only allow
certain codes. For example: I would like only the following written exactly
as is here to be allowed to be entered into a column:

AUTO

HOME

DP-3

DP-2

How can I set the column to only allow these & can I make it so it will
display the codes for the user.

Thank you.
 
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