for time management 
personal digital assistant
Small pocket computer that stores in memory and manages a variety of information such as addresses, telephone numbers and appointments.
Keys corresponding to numbers, mathematical operators and functions that are placed in a specific order to speed up numeric data entry.
Keys corresponding to letters, symbols and functions used to generate characters or control operations.
Liquid crystal display screen on which graphics or text data are displayed.
Device used to print the arrival and departure times of employees on time cards.
Card on which an employee’s arrival and departure times are listed so that worked time can be precisely calculated.
Liquid crystal display showing a variety of information (including date, hour and settings).