1 2 Basics of Computer Systems Ch.1-A,B,C FALL 2000 Rob Wolfe

2 2 DIT Wolfe Introduction Follow-up Web: Web: Syllabus (added web address) Syllabus (added web address) Lesson Slides (print 3 per page) Lesson Slides (print 3 per page) Group (four per, exceptions) Group (four per, exceptions) Schedule Schedule Lesson/Lab (work with partner from group) Due Dates prior to Midnight. Visit to WA computer room.

2 3 DIT Wolfe What is a System?

2 4 DIT Wolfe Input Output Blackbox Theory

2 5 DIT Wolfe What is a Computer? According to Dr.John Von Neumann, a computer is an electronic device that According to Dr.John Von Neumann, a computer is an electronic device that Accepts input Processes data Stores data Produces output Early computers Early computers EDVAC ENIAC

2 6 DIT Wolfe What is a Computer?

2 7 DIT Wolfe Categories of Computers Network Computers Network Computers Microcomputers Microcomputers Workstations Workstations Midrange Computers (Mini) Midrange Computers (Mini) Mainframes Mainframes Supercomputers Supercomputers

2 8 DIT Wolfe Microcomputer System Components

2 9 DIT Wolfe Peripheral Devices Are equipment used to enhance a computer’s input, output, or storage functions Are equipment used to enhance a computer’s input, output, or storage functions Allow you to expand and modify your basic computer system Allow you to expand and modify your basic computer system Are often designed for installation by non- technical users Are often designed for installation by non- technical users

2 10 DIT Wolfe Peripheral Devices Bar code reader Scanner Modem Monitor Trackball Sound card Mouse Printer Touch-screen Speaker input input/output? Telecom output input input/output input output input/output output Input? Output? or Else?

2 11 DIT Wolfe Computer Networks Computer Network — a collection of computers and other devices connected to share data, hardware, and software Computer Network — a collection of computers and other devices connected to share data, hardware, and software Network users are prompted for … Network users are prompted for … User ID — a combination of letters and numbers that serve as your “call sign” or “identification” Password — a special set of symbols known only to you and the network supervisor

2 12 DIT Wolfe User Interface Software controls the user interface and defines its characteristics Software controls the user interface and defines its characteristics Hardware controls the way you physically manipulate the computer to establish communication Hardware controls the way you physically manipulate the computer to establish communication The user interface is a combination of hardware and software.

2 13 DIT Wolfe User Interface Prompts Prompts Commands Commands Menus & Dialog boxes Menus & Dialog boxes GUI GUI

2Review Computer (Definition) Computer (Definition) Device that accepts input, processes data, stores data and produces output. Relationship between SW and HW Relationship between SW and HW Software sets up the computer to do a particular task then tells the computer how to interact with the user and how to process the user’s data. Typical Microcomputer System Components Typical Microcomputer System Components System Unit (CPU) Storage Media (CDROM, Floppies, HD) Monitor Keyboard Mouse

2 Review Continued List the common Microcomputer peripherals List the common Microcomputer peripherals Printer, zip drive, scanners, LCD projection, sound card, plotter, trackball, mouse, video camera, graphics tablet, bar code reader. Define User Interface Define User Interface The means by which humans and computers communicate. Is User Interface HW or SW? Is User Interface HW or SW? Combination of both

2 Review Continued How do you use the following user interface elements: How do you use the following user interface elements: Prompt message displayed by the computer asking for input Command instruction you input to tell the computer to do a task Menu/submenu displays a list of commands of options Graphical object (Graphical User Interface) Picture on the screen which you can manipulate