Put a combo box, named cboType whose record source includes all possible types, at the top of your form. This can be a 1 column table or a value/list.
On the combobox afterupdate event, reset the fom rowsource and requery the form, e.g.
me.recordsource="SELECT * FROM YOURTABLENAME WHERE TYPE = '" & cbotYPE & '"
me.requery
Note that '" is tick mark then quote.