Rathenow 2008-08-13

Notes of the computer class in Rathenow.



  • input: Keyboard/Mouse
  • output: Monitor, Printer, Headphone
  • base unit:
    • processor
    • RAM
    • hard disk
    • power supply


  • operating system
    • Microsoft Windows 85%
    • Mac OS (based on Unix) 10%
    • Linux (based on Unix) 5% → Why using Linux and not Windows?


  • cleaning mouses
  • mouse-functions:
    • left click LC
    • right click RC
    • double click = 2 x LC (fast)


Titlebar: click, hold and move → move the window

Corners & edges: moving the mouse over corners & edges leads to changed symbols: click, hold and move → resize the window

Buttons on the right upper corner:

 close the window (and the according application) → content forgotten
 hide=minimize the Window → the Window can be opened again with the same content (restored) by clicking on the symbol in the panel/taskbar
 maximize the window → the window fills the display and the button changes to . Clicking the symbol  resizes the window to the previous size.
 reduces the window to the titlebar and the button changes to . Clicking the symbol  shows the whole window again.



Open two windows, resize and place them on the screen beneath each other filling the whole screen:

window     window    

Open three windos and place them according to the following drawing (the last row symbolizes the panel):

window 1 (enabled)    
window 2     window 3    
window 1 window 2 window 3

Windows can be enabled (active) or disabled (inactive). If you want to do anything with a window (for example change the size or input text), you have to enable it first. You can enable a window by clicking into it. The enabled window comes to the foreground and usually gets another titlebar-color.

Maximized windows can’t be resizedpress  first! The button will change to .


Special Keys     Arrows Numbers

Open Applications > Office > Abiword (a text editor we need for practicing)

  • Shift and Alt Gr change the character that’s written when you press a button.
    • Press Q
    • Press Shift + Q simultaneous
    • Press Alt Gr + Q simultaneous
  • Caps Lock (right on top of the left shift) locks to CAPITAL LETTERS. A light on the upper right corner on the keyboard should indicate activated Caps Lock.
    • Press caps lock
    • Type letters and see what happens
    • Press caps lock again to switch it off
  • Enter/Return inserts a new line.
  • Space (the long empty button on the keyboard) inserts an empty space between letters.
  • Arrows, backspace & Entf:
    • Type ABC
    • Use the arrow keys to move the cursor between A and B
    • Remove the A by pressing backspace (in the upper right corner)
    • Remove the B by pressing Entf

Type two new lines with the following text:

Dimitris says
“I am tired”

(The red line under ‘Dimitris’ indicates, that the computer doesn’t know the word ‘Dimitris’.)