IS Fall 2009 Chapter 3 8/31/2009

LOOKING AT THE PARTS 8/17/2009IS 2101/01---Fall 20092

Sound Analog to Digital for input Digital to analogue for output – Wave synthesis – MIDI – Sound samples 8/17/20093IS 2101/01---Fall 2009

Overview Of System Parts CPU Motherboard Memory Secondary Storage Buses Cache Expansion cards 8/17/20094IS 2101/01---Fall 2009

Central Processing Unit What does the CPU do? Different brands of CPU Processing power Multi-core 8/17/20095IS 2101/01---Fall 2009

Primary Memory RAM ROM – PROM – EPROM 8/17/20096IS 2101/01---Fall 2009

Enough RAM 8/17/20097IS 2101/01---Fall 2009

Using The Task Managere Invoking the Task Manager Applications Processes – Caution Performance 8/17/20098IS 2101/01---Fall 2009

Secondary Storage Magnetic Optical – DVD/CD – Read, write, rewrite Flash memory – Writing is slow – Reading is much faster 8/17/20099IS 2101/01---Fall 2009

Adding Storage Adding a hard drive Adding or replacing the CD/DVD 8/17/200910IS 2101/01---Fall 2009

More Parts Buses to connect Cache to store temporarily 8/17/200911IS 2101/01---Fall 2009

Evaluating the System System properties – Right-click My Computer Disk properties – Right-click the disk icon in My Computer 8/17/200912IS 2101/01---Fall 2009

Start Here 9/2 8/17/200913IS 2101/01---Fall 2009

Communication A port is a physical connector used by the computer to communicate with other devices Parallel Serial – USB Network – Ethernet 8/17/200914IS 2101/01---Fall 2009

Communication Some communication is not over physical wires or cables Wireless ethernet Bluetooth Infrared 8/17/200915IS 2101/01---Fall 2009

Expansion Cards Generally used to provide connections to external devices Graphics cards for connecting to monitors Network cards 8/17/200916IS 2101/01---Fall 2009

Software Application software System software – Firmware – Operating system – Utilities 8/17/200917IS 2101/01---Fall 2009

Operating Systems Provides the foundation for all other software Application Programmer’s Interface User interface to control the system – GUI – Command line 8/17/200918IS 2101/01---Fall 2009

Different OS’s Different hardware Different services and resources provided Some are free 8/17/200919IS 2101/01---Fall 2009

Common OS’s Microsoft Windows – Intel type CPU’s OS/X – Macintosh Linux – Numerous processors supported – Many free versions 8/17/200920IS 2101/01---Fall 2009

Some Utilities Disk Defragmenter Task manager Task scheduler Backup 8/17/200921IS 2101/01---Fall 2009

Some Applications Productivity software Entertainment software Development software 8/17/200922IS 2101/01---Fall 2009

Some Productivity Software Spreadsheet Word processing Database Presentation Communication ( ) Image manipulation 8/17/200923IS 2101/01---Fall 2009

Networks Extent – Local area – Wide area – Internet: a confederation of local area networks Topology – Bus: shared communication line – Others: star, ring 8/17/200924IS 2101/01---Fall 2009

Safe Practices Maintenance – Backups – Updates Malware – Viruses – Spyware Hacking – Firewalls 8/17/200925IS 2101/01---Fall 2009

Ergonomics Figure 37 on page 135 Wrist support on keyboard – And mouse Monitor at eye level or below Legs at comfortable angle 8/17/200926IS 2101/01---Fall 2009