human-computer interface

human-computer interface

1. operating systems

   • =software
     • used to control software directly
       • used to run the applications software

2. FUNCTIONS OF OPERATING SYSTEMS 1

   • manage and control devices
     • provide a user interface
       • hide the complexity of hardware from the user and deal wiith errors
         • provide interface between applications software and hardware
   • functions of operating systems 2
     • allow installation of new hardware and software
     • utilites for virus scanning
       • handle storage of data
       • maximize memory use

3. types of user interface

   • graphical user interface (GUI)
     • Command line-type a series of commands
     • voice driven
       • menu/dialouge boxes
         • touch sensitive
           • biometric

4. WIMP

   • WINDOWS
     • ICONS
       • MENUS
         • POINTERS

5. ADVANTAGES OF COMMAND LINE

   • quicker than going through all the different windows
   • DISADVANTAGES OF COMMAND LINE
     • DIFFICULT FOR BEGINNERS
       • ALL INSRUCTIONS HAVE TO BE REMEBERED

6. ADVANATaGES OF GUI

   • no specialist language needed just a mouse and off you go!
   • use of icons allows beginners to get to programs or items they want
   • DISADVANTAGES
     • More memory needed for computer to operate
     • icreased processing requirements are needed to run the GUI