1. Chapter 3

2. System Software and Software Development
Module 3A System Software
Module 3B Programming Languages
Chapter 3

3. System Software Operating Systems (OS): The Computer’s Traffic Cop
Exploring Popular Operating Systems: A Guided Tour
System Utilities: Tools for Housekeeping
Module A

4. Operating Systems kernal/supervising program memory resident
System Software
Operating Systems
kernal/supervising program
memory resident
The OS is much like a computerized version of a traffic cop, standing at the intersection of the computer’s hardware, application programs, and the user.
Module A

5. Operating Systems Managing Programs single-tasking multitasking
System Software
Operating Systems
Managing Programs
single-tasking
multitasking
foreground application
background application
multiprocessing
Module A

6. System Software
Operating Systems
The OS manages programs, parcels out memory, deals with input and output devices, and provides means of interacting with the user
Module A

7. Operating Systems Managing Memory Handling Input and Output partition
System Software
Operating Systems
Managing Memory
partition
virtual memory
swap file
Handling Input and Output
device drivers
Module A

8. User Interface Types of User Interface User Interface functions
System Software
User Interface
Types of User Interface
command-line
menu driven
graphical user interface (GUIs)
User Interface functions
gain access (log on)
start (launch)
manage disks and files
shut down safely
Module A

9. Exploring Popular OS Unix Xerox PARC & the first GUI MS-DOS Mac OS
System Software
Exploring Popular OS
Unix
Xerox PARC & the first GUI
MS-DOS
Mac OS
Microsoft Windows 3.x
Module A

10. Exploring Popular OS Microsoft Windows 95 and 98 Microsoft Windows CE
System Software
Exploring Popular OS
Microsoft Windows 95 and 98
Microsoft Windows CE
Microsoft Windows NT
Linux
Module A
For the latest on Linux, visit Linux online

11. System Utilities: Tools for Housekeeping
System Software
System Utilities: Tools for Housekeeping
Backup utilities
Antivirus software
File compression utilities
File defragmentation programs
Module A

12. System Software
Antivirus Software
Norton AntiVirus is a utility that works by examining all the files on a disk, looking for the tell-tale "signatures" of virus code
Module A

13. Programming Languages
First Generation : 1s and 0s
Second Generation: A little Easier
Third Generation: Programming Comes of Age
Fourth Generation: Getting away from Procedure
Object Oriented: A Revolution in the Making?
A Guide to Programming Languages: One Size doesn’t Fit All
Module B

14. Programming Languages
First Generation
machine language: 1s and 0s
machine dependent
Second Generation
assembly language
low-level
mnemonics
Module B

15. Third-Generation Languages (3GL)
Programming Languages
Third-Generation Languages (3GL)
Description
Procedural
high-level
Compilers
source code/object code
low-level
Interpreters
Module B

16. Third-Generation Languages (3GL)
Programming Languages
Third-Generation Languages (3GL)
Spaghetti Code
software crisis
Structure Programming
Pascal/Algol
low-level
Modular Programming
Module B

17. Fourth-Generation Languages (4GL)
Programming Languages
Fourth-Generation Languages (4GL)
report generators
query languages
Structured Query Language (SQL)
natural language
Module B

18. Object-Oriented Programming: A revolution in the making
Programming Languages
Object-Oriented Programming: A revolution in the making
Eliminating the program vs data distinction
What is an object?
Classes
Inheritance
Rapid Application Development (RAD)
Middleware
Module B

19. A Guide to Programming Languages
COBOL
business programming
Y2K
Fortran
scientific/mathematical/engineering
good for complex problems
Module B
Learn more about COBOL by reading the FAQ located on the Oxford University Library Automation Service

20. Structured & Modular Languages
Programming Languages
Structured & Modular Languages
Ada
Visual Basic
event-driven
Vbscript
ActiveX controls
Pascal
Module B

21. Object Oriented Languages
Programming Languages
Object Oriented Languages
# include <iostream.h>
void main () {
cout <<“Hello
World!”;
Smalltalk
C and C++
A simple C++ program that prints Hello World to the screen
Module B
If you’re thinking about a career in computer science, C++ is the language to learn. For more information see the C++ Virtual Library and C++ FAQ Lite

22. Object Oriented Languages
Programming Languages
Object Oriented Languages
Java
JavaScript
class Hello World {
public static void main (String args
{ } ) {
System.out.println (“Hello World!”) }
Simple Java code
Module B
To learn more about Java, visit Java’s home page at Sun Microsystems