Gülçin Sağdıçoğlu Celep

Department of Mathematics METU 2003

        Computer Hardware Operating systems Terms Disk capacities Viruses Applications and Documents Installation/reinstallation Internet Applications

Computer Hardware
         Case Power switch Reset switch Hard drive Floppy CD/DVD Serial ports Parallel port USB port          Keyboard/mouse Network card Modem Sound card Video card RAM Motherboard Fan Cables

The basic system including keyboard, mouse and monitor.

What is in the box? Motherboard

Typical parts of a motherboard.



For items in or attached to a system to work properly they must be securely connected.

Operating systems
 All computer systems have an operating system. Currently, there are three dominate typical user operating systems.
 Macintosh OS,  Microsoft Windows OS,  Linux.

  A: Floppy disk C: Local disk D: Local disk

RAM = Random Access Memory. The thinking space available to a computer to use while performing operations. The space is emptied out when the computer is turned off. DIRECTORY = An organizational structure on disks to file management easier. Directories also become a local region for the computer to hunt for other files related to the current file.



DOCUMENT = A file created using an application. The file is only useful using the application that created it or a similar application that can convert it.
APPLICATION = A program that allows a computer to perform a certain function.


Disk capacities
 Floppy:  Hard disk:  CD  DVD 1.4 MB 20 GB – 160 GB 700 - 800 MB 4.7 GB 17 GB
1 KILOBYTE = 1000 BYTE 1 MEGABYTE = 1000 KB 1 GIGABYTE = 1000 MB

Floppies, CDs

Identify and use icons, windows, menus
         Point, click, double-click, drag & drop Minimize and maximize a window Use pull-down menus Select, open, and move an icon Select, open, move, and close a window Resize a window Scroll a window Activate and de-activate a window Start an application and create a document

Name, save, retrieve, revise a document
         Name a document (!) Save a document Retrieve a document from floppy disk Retrieve a document from hard disk Re-name a document Edit and re-save a document Print a document Create and name folders Save, open, and place documents inside folders

 Open and work with more than one application at a time
 To switch between them for Windows: click on the application at the "TASKBAR" down on the screen  Alt &TAB button

Install/reinstall and update system software and drivers

Internet Applications
BROWSERS  Netscape

 Internet Explorer

http: Hyper Text Transfer Protocol edu: Education (gov, org, com, ...)

FTP (File Transfer Protocol)
 The simplest and most secure way to exchange files over the Internet.  FTP Client is the software that is designed to transfer files back-and-forth between two computers over the Internet. It needs to be installed on the computer and can only be used with a live connection to the Internet. (Browsers, WS-Ftp, SSH, Cute-Ftp,...)



 Viruses are programs that reproduce themselves into the files of your computer  Anti-virus software and automatic update  Mcafee Virus Scan

Configuration of Automatic Mcafee Virus Update via FTP


Current security patches applied to operating system and applications. Do not open any unexpected attachments that are e-mailed to you. (Particularly “.exe” files.)


 Computer Fundamentals for Teachers  Basic Computer Operation and Troubleshooting  FTP New User Guide

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