© Acomptuter program isa set of detailed, step-by-step instructions that tells a computer how to solve a problem or carry out a task... © Software 1s categorized as either application so
Trang 2Objective
© What is the software’?
© How is software categorized?
© What is an operating system ?
© What does an operating system do?
ATHENA
Trang 3What’s the software ?
© Softw are is the instructions and associated
data, stored in electronic format, that direct the
computer to accomplish a task
© Acomptuter program isa set of detailed,
step-by-step instructions that tells a computer how to solve a problem or carry out a task
ATHENA
Trang 4How is software categorized?
© Software 1s categorized as either application
software or system software
© Application software is designed to be used
for a purpose such as drawing designs, creating documents, etc
© System software is designed to help the
computer carry out the basic operating functions
Ex: Operating systems, utilities, and drivers
ATHENA
Trang 5Operating System Overview: What
is an Operating system ?
© An operating system (QOS) is the master
controller for all of the activities that take place within a computer
Ex: Microsoft Windows XP, Mac OS, Linux, UNIX
© The operating system also interacts with the
next functional layer called application software
ATHENA
Trang 6How is software categorized?
System ; Software Software
Mathematical Modeling Statistical
ATHENA
Trang 7What does an operating system do?
Example:
2 The word processing
application signals the operating system that a document must be sent
| `" printer
1 You issue the Wn
ATHENA
Trang 8Personal Computer
Operating Systems
© Windows, Mac OS, Linux, Unix, and DOS
© What’s the best-selling operating system’?
Windows 2.0 Windows NT 1998 _ 2001
199O
1985
M/indows 1.0 Windows 95
Windows 3.1 Windows ME
ATHENA
Trang 9Personal Computer
Operating Systems
© Microsoft Windows is the most popular, and 1s
installed on over 80% of the world’s personal
computers
© UNIX was developed in 1969 at AT&T's Bell
Labs
© Linux was developed in 1991
© DOS (Disk Operating System) was developed by
Microsoft
ATHENA
Trang 10Personal Computer
Operating Systems
© Different operating systems are needed
for different computing tasks:
Ex: MS-DOS, Windows 3.1, Windows 3.11
Ex: Windows Server 2000/2003
¢ Network operating system
Ex: Linux, Unix, Windows Server 2000/2003
Ex: Windows Server 2000/2003
Ex: Windows 95, Windows Me, Windows XP
ATHENA
Trang 11Summary
© Software
© How is software categorized?
© operating system Overview
© What does an operating system do?
ATHENA