->  A SERVICE is a quantity of work performed.  A beginning and ending time are
    required.
->  A DISBURSEMENT is an expense, money that your office has spent.
->  A RECEIPT is income, money that your office has received.

->  CAT is the income/expense category into which a disbursement or receipt
    falls.  A number between 1 and 999 is required.  If you're conscientious
    about regularly filling in this item, you'll be able to produce income-
    expense reports.