Printable Presentation

1

CISM1502 LECTURE


Thomas Burns


Asst. Professor, Business
Information Systems

2

Computer Field and Job Market


Number One top paying 4 yr. degree is Computer
Science and most Engineering degrees. Many
business degrees are not far behind. Social Science
and humanities majors have a rough time of it!!.



The computer field has a surplus of jobs and not
enough people to fill them and it will be even
more so in the future.



You will be working with computers eventually in
every occupation. Pick your niche or occupation
and specialize in computers. Ex. Geographic Info
Systems.

3

Computer Field and Job Market


Programmer


System Analyst


Web Master or Designer


Networking Specialist


Database Specialist


Game Designer


Computer Consultant



Common positions in the field

4

INTRODUCTION



Agrarian Society




Industrial Society




Information Society

5

Computer Issues



Information Privacy (identity theft)


Information Accuracy


Hackers and Crackers


Viruses and Worms, Trojan Horses and logic
time bombs


Software Piracy


Computer security: firewalls and Encryption



6

Authorized employees
59%
Unauthorized employees
24%
Hackers 14%
Competitors 3%
Computer Issues

Who commits Cyber crime?




Protect yourself from problems
involving hackers and viruses



Do not open email attachments unless your
certain that they don’t carry a virus


Always be sure that your operating system
has all the up
-
to
-
date patches


Always use encryption for any sensitive
data such as giving out credit card #s over
Internet

8

What makes computers so
powerful??


Speed of Circuitry


Memory (storage capacity)

9

BINARY STORAGE


8 Bits (electronic impulses) = 1 Byte


1 Byte = 1 character of information


1 Kilobyte = 1,000 bytes


1 Megabyte = 1,000,000 bytes


1 Gigabyte = 1,000,000,000 bytes


10

History of Computers


1
st

Generation

–

(1950s) Vacuum
tubes


2
nd

Generation

–

(1960s) Transistors,
Assembler language


3
rd

Generation

–

(1960s) Silicon
chips and higer level languages


4
th

Generation

–

(1970s)
Microcomputers and VLSI


5
th

Generation

–

(1990s) Networking,
supercomputers



11

A computer is an
electronic device

used to manipulate information
based on a
set of instructions

HARDWARE

SOFTWARE


Central Processing Unit



Input Devices



Output Devices



Secondary Storage

–
Disk, Tape, Optical


Operating Systems




Application Software



Programming languages

SECONDARY STORAGE



MAGNETIC TAPE




DISK DRIVES




OPTICAL STORAGE

13

A computer is an
electronic device

used to manipulate information
based on a
set of instructions

HARDWARE

SOFTWARE


Central Processing Unit



Input Devices



Output Devices



Secondary Storage

14

TYPES OF COMPUTERS


MICRO
-
COMPUTER (P.C.)

–
handheld, laptop (notebook), and desktop


MINI
-
COMPUTER



MAINFRAME COMPUTER



SUPERCOMPUTER

15

Distributed Data Processing

(Networking)


WHAT IS A NETWORK

–
dumb terminal vs. node in a network


WHY IS IT BETTER

–
much less expensive than purchasing a mainframe or
minicomputer.

–
distances are no longer a factor
-

more efficiency
(client/server relation)

–
It matches our interaction more precisely
-

A group of
individuals sharing and collaberating. Not Borgs


The Internet is the largest network in the
world comprised of thousands of
independent networks in academia, military,
government and commercial enterprises
(several hundred thousand networks and
growing). Over 500 million users and
expanding every day by tens of thousands.

Then type in the URL address

(1) (2) (3) (4)

Protocol Host name Path File Name

http:// gc.peachnet.edu /www/tburns/ stu.htm


Otherwise use search engines such as Yahoo,


or even better a meta search engine such as

www.IXQUICK.com


First pick a ISP and a browser such as explorer.



Write HTML
-

Hyper
-
Text Markup
Language
( JAVASCRIPT)


Or use a web developer tools such as
Frontpage or Flash


Submit your page to your ISP. Then submit
it to the major search engines or let the web
-
bots find you.

INTRANET


More and more business networks are going to
Intranets so that they can connect easily with
the Internet and so they can use the same easy
TCP/IP protocol user friendly environment.
Groupware and outside access can be achieved
but firewalls are used for protection of
confidential data.

INTRODUCTION TO
WINDOWS


Everything is stored in files:

–
.com .exe .gif .jpg .wav .doc .mov


Files are stored in Folders on secondary
storage


You can copy and paste, delete, and rename
files and folders


Windows allows multi
-
tasking