Cs105 – Computer Concepts Module 2 Intructor: Dan Pletea UMASS Boston Hardware vs. Software 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 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 Local Applications in Business • Accounting (Excel, …) • Science and Engineering (Mathematica, Math Lab, System R, Weka, … ) • Medicine ( Computerized Axial Tomography scan ) 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. 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 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 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. Algorithm • A sequence of well-defined steps or instructions for doing a task. • An algorithm should end (Stop) at some point. 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/index.asp 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/LaTeXPrimer/ 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. 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. 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.
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