The title of this Question may not be accurate because I wasn\'t sure how to ask the question.
Is there A way to have an ID field in AC 2010 the has a constant part and
Access has a data type called autonumber which will generate a unique number for each record automatically but it does not allow for the alpha prefix.
if it is indeed constant then the simplest approach is to prefix with it for display, ie in the table the field would be called recId (for example) and you would view the rows via a query with a calculated column
EmpId: "EMP" & format$(RecId,"0000")