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AGENDA

AGENDA. Articles Chapter 3: Computer Hardware Chapter 4: Computer Software Team Work. Open Systems Diagram. Conversion Process. Input. Output. Feedback. Environment. CH.3: Computer Hardware. Major Components: CPU--ALU, Control Unit, Registers Primary Storage--ROM, RAM, Cache

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AGENDA

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  1. AGENDA • Articles • Chapter 3: Computer Hardware • Chapter 4: Computer Software • Team Work

  2. Open Systems Diagram Conversion Process Input Output Feedback Environment

  3. CH.3: Computer Hardware • Major Components: • CPU--ALU, Control Unit, Registers • Primary Storage--ROM, RAM, Cache • Secondary Storage--Tape, Disks, DASD, Optical Disks, Smart Card • Input Units--Keyboard, Mouse, Scanner, Handwriting, Voice • Output--CRT, LCD, Printers, Voice • Types of Computers: Supercomputer, Mainframe, Minicomputer, Workstation, PC, Laptops, PDA • Technology is a Fast Moving Train! • Remember: Computers are only tools. What is the best tool for the task--that should determine what is used.

  4. CH.3: Computer Hardware (cont) • Hard Drive • Media Types (floppy, Zip, CD, DVD, tape) • Cell Phone, PDA, MP3 player • Cables • Boards • SCSI, Firewire, USB, USB 2, Parallel • USB Drive What are the potential security implications and concerns?

  5. CH.4: Computer Software • Software Tells Hardware What to Do • Programming Languages • First-Generation--Machine Language • Second-Generation--Assembly Language mnemonic AD, SUB • Third-Generation--Procedural FORTRAN, COBOL, BASIC, PASCAL, C, C++ [Page 83, Exhibit 4.1] • Fourth-Generation--SQL, DBMS, Spreadsheets • Query and Dbase abilities that simplify retrieving data from Dbase • Code generation abilities that produce programming statements 2 Other Approaches: CASE and Object Oriented

  6. CH.4: Computer Software (cont.) • Language Translators • Assemblers • Compilers--syntax analysis, code generation, optimization • Interpreters--slower than compiled • System Management Software • Operating System--Windows 98, NT, 2000, XP, Unix, Mac OS • Accepts and executes commands and requests • Manages, loads and executes programs • Manages hardware resources of the computer time-slicing • Interface--command-based, shells (Windows 3.1), GUI • Utility Programs • Programs that support computer operations • Programs that provide generalized file manipulation • Generalized computational programs

  7. CH.4: Computer Software (cont.) • Application Software--General Purpose • Word Processors edit capabilities • Desktop Publishing • Spreadsheet Software VisiCalc, macros • Statistical Packages SPSS, SAS • Database Management Software • Integrated Software Packages What are the advantages? Disadvantages? • Application-Specific Software:Program designed to solve a single somewhat specifically designed problem. • In-house development • Purchased or leased--COTS • Modify an existing package • Integrated vs. Interfaced

  8. Open Systems Interconnection (OSI) Model The OSI Reference Model describes seven layers of related functions that are needed at each end when a message is sent from one party to another party in a network. An existing network product or program can be described in part by where it fits into this layered structure. For example, TCP/IP is usually packaged with other Internet programs as a suite of products that support communication over the Internet. This suite includes the File Transfer Protocol (FTP), Telnet, the Hypertext Transfer Protocol (HTTP), e-mail protocols, and sometimes others. Although TCP fits well into the Transport layer of OSI and IP into the Network layer, the other programs fit rather loosely (but not neatly within a layer) into the Session, Presentation, and Application layers.

  9. Team Assignment • Choose one of the exercises from the chapters discussed today. Your team may choose anyone you like an address at least two points or questions in the exercise.

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