Hi Bruce,
If you are wanting to create a new field in your table and update it with the data from two other fields, then consider not doing that. It becomes redundant data and it is also a 'calculated field' - both of which are not considered to be good table design. However, you can do the 'calculation' on a form or a report and view the the information the way you want to see it.
For example, let's say that on your form you have two textboxes. One textbox is named is "txtProjects" and the other is named "txtField". On this form you place new textbox, name it txtProjectField and in the control source property of the new textbox you type:
=[txtProjects]&" - "&[txtField]
When the form is in from view, the new textbox will display something like this:
"RSS - 123"
If you don't want the dash between the two bits of data, write the formula like this:
=[txtProjects]&" "&[txtField]
and it will display "RSS 123".
Hope this helps.