CS105 Module2

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CS105- Module2
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Hardware vs. Software
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Local Applications

• Local applications are programs or software that
  can be run on a single computer.
• The computer on which the local application is
  running does not have to be connected to a
  computer network such as internet.
• Examples

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Examples of Local Applications

• Media Players (Windows Media Player, RealPlayer,
  Winamp, )
• Word Processors(MS Word, Latex, WordPad,)
• Graphic, photo and animation applications
  (PhotoShop, Word Photo Manager, 3D Studio MAX).
• Calculator

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Local Applications in Business

• Accounting (Excel, )
• Science and Engineering (Mathematica, Math Lab,
  System R, Weka, )
• Medicine ( Computerized Axial Tomography scan )

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File Type

• Broadly classified as either text file or binary
  file.
• Text file, the data are organized as characters.
• Binary file requires specific interpretation of
  the bits and the application which supports this
  file knows how to interpret it.

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File Type

• Usually the file name has two parts the main
  name and the file extension. The extension
  indicates the type of the file.
• .txt
• .mp3
• .tex
• .wav
• .gif
• .zip
• .jpg
• .doc
• .html
• .java
• .c
• .ppt

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File Operations

• Create a file
• Delete a file
• Open a file
• Close a file
• Read data from a file
• Write data to a file
• Delete contents of a file
• Rename a file
• Copy a file
• Append data to the end of a file

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Directory

• Directory is a named collection of files. It is a
  way to group files so that you can organize them
  in a logical manner.
• In Windows methodology a directory is called a
  folder.
• Other than files a folder can contain other
  folders.

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Algorithm

• A sequence of well-defined steps or instructions
  for doing a task.
• An algorithm should end (Stop) at some point.

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Word Processors - MS Word

• What you see is what you get!
• Word is a very popular text editing software.
• Enter and edit the text.
• Insert and edit images.
• Arrange page orientation, border, shade, etc.
• Use bullets in Word.
• Check the grammar and spelling of the contents.
• A basic tutorial for MS word 2007 is available
  at
• http//www.fgcu.edu/support/office2007/Word/in
  dex.asp

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Word Processors - LaTeX

• It is not very easy to write mathematical
  equations in MS Word. A much better alternative
  is LaTeX.
• LaTeX is not a WYSIWYG.
• First we write a .tex file, then we compile it.
• Example.
• A basic tutorial for Latex is available at
• http//www.maths.tcd.ie/dwilkins/LaTeXPrim
  er/

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Spreadsheet

• A spreadsheet is the computer equivalent of a
  paper ledger sheet used by accountants couple of
  decades ago.
• Using ledger sheet a small mistake could have
  resulted in redoing the whole page again. But we
  can undo any action.
• Also the calculation could have been
  overwhelming. But using spreadsheets, computer
  will take care of calculations.

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What is PowerPoint?

• A complete presentation graphics package.
• Gives you everything you need to produce a
  professional-looking presentation.
• Offers word processing, outlining, drawing,
  graphing, and presentation management tools.

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Graphics Processing

• A very simple graphics processing application is
  the Paint.
• In a painting program, we decompose an image into
  a collection of small dots, known as pixels.
• If you zoom on a picture you will see these dots.