Abstract: An electronic device for monitoring the number of hours worked during a period covering a preselected number of consecutive work days utilizes a case and a computer mounted in the case including memory containing information relating to a maximum number of hours which are permitted to be worked during the period of consecutive work days and to a maximum number of hours which are permitted to be worked during any one work day of the period. The computer includes a keyboard for manually entering at the end of each day of the period the number of hours worked during that one day and a processor responsive to the number of hours entered through the keyboard for calculating the number of hours worked during a consecutive day period ending with that one day, the permitted number of work hours remaining during a consecutive day period ending no earlier than the following day and the number of hours that the user is permitted to work on the following day.