1 Computer Software Unit C

2 Objectives Introduce Computer Software Explain How Computers Interpret Software Define Document Production Software Define Spreadsheet Software

3 Objectives Define Database Management Software Define Graphics Software Define Business and Science Software Define Entertainment and Education Software Understand Licenses and Copyrights

4 Software Categories System Software Application Software

5 System Software OperatingSystemsDeviceDriversUtilitiesProgrammingLanguages DOS Windows Linux UNIX Mac OS

6 Application Software DocumentProduction SpreadsheetSoftware Accounting & Finance MathematicalModeling Statistical Entertainment DataManagement Graphics Music VideoEducational Reference

7 Software Topics Computer program –main executable program (.exe) Support module –called by the program (.dll) Data module –Example: a dictionary file or a file that is not supplied by the user

8 How Computers Interpret Software Computer programmers write instructions for programs Most businesses purchase software instead of writing their own

9 How Computers Interpret Software Computer languages –Source code –High-level languages: COBOL, C++, Java Machine language Compiler –Creates object code in single batch Interpreter –Converts one instruction at a time –Common with web-based scripts (part of web page)

10 Document Production Software Use to compose, edit, design, print or electronically publish documents Types –Word processing (Word) –Desktop publishing (PageMaker) –Web authoring (Front Page)

11 Document Production Elements Formatting Page Layout Headers/FootersClipartTables Frames Spell check Word wrap Margins Styles

12 Spreadsheet Software Use for numerical calculations and graphs Rows and columns Worksheet, cell, cell references Cells can contain –Values –Labels –Functions –Formulas

13 Spreadsheet Software Formulas vs. functions Relative vs. absolute cell referencing Automatic recalculation Templates What-if analysis Not always best for business

14 Data Management Software Use to store, find, organize, update and report information Database: collection of related files Records and fields

15 Data Management Software Using database software you can: –Import and export data –Query records in a particular field SQL (Structured Query Language)SQL (Structured Query Language) Natural query languageNatural query language Query by example (QBE)Query by example (QBE) –Print reports Always use information appropriately –Data integrity –Privacy –Copyright

16 Graphics Software Use to create, display, modify, manipulate and print graphics Paint software: realistic art and photos Photo Editing software: simplifies common editing tasks Drawing software: uses vector figures & shapes to create “cartoon-like” images.

17 Graphics Software 3-D Graphics software: create wireframes and then cover with a texture CAD (computer-aided design): 3-D software designed for architects and engineers Presentation software: creates electronic slides like these

18 Business Software Accounting & Finance –Personal finance –Tax preparation –Small business accounting Vertical Market –Hospitals, construction, schools Horizontal Market –Generic like payroll –Project management Groupware –Help collaboration on group projects

19 Science Software Statistical/graphing software Mathematical modeling software –Math CAD

20 Software Suites A collection of application software sold in a package –Microsoft Office, Star Office, Open Office, WordPerfect Office Available for productivity, antivirus, and graphics Cost and usability

21 Entertainment Software Audio editing (sound recorder) Games MP3 player Video editing (Adobe Premiere) Music Ear training Ear training Notation Notation Computer-aided music Computer-aided music MIDI sequencing MIDI sequencing

22 Educational Software Learn and practice new skills –Arithmetic –Reading –Languages –Typing –SAT Reference software (CD-ROMs)

23 License vs. Copyright Software License: a legal contract that defines the ways in which you may use a computer program. Copyright: a form of legal protection that grants the author of an original work an exclusive right to copy, distribute, sell and modify that work. Software piracy For contract to take effect: –Open a shrink-wrap license product –Agree to an installation agreement

24 Types of Copyright Protections Commercial: License adheres to limitations of copyright law Shareware: try before you buy on the honor system Freeware: no fee - can use, but not alter or sell Open Source: uncompiled source code that can be changed - sold or free Public Domain: can be copied, altered and resold

25 Types of Licenses Single-user Site license Multiple-userConcurrent-user

26 Tech Talk: Installing Software System requirements –Operating system and minimum hardware capacities Steps (setup.exe) –Copy files to hard drive –Uncompress if necessary (Win Zip) –Verify system requirements met –Select appropriate device drivers –Necessary system files/players (Media Player) –Update registry and program menu Uninstall routine or Windows Add/Remove programs

27 Issue Is Privacy a Problem?

28 Computer Software End