Essentials Of Computing I CSCI 104 Computing Concepts
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Transcript of Essentials Of Computing I CSCI 104 Computing Concepts
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ESSENTIALS OF COMPUTING I
CSCI 104
COMPUTING CONCEPTS
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OBJECTIVES
• EXPLAIN THE FIVE PARTS OF AN INFORMATION SYSTEM: PEOPLE, PROCEDURES, SOFTWARE, HARDWARE, AND DATA.
• DISTINGUISH BETWEEN SYSTEM AND APPLICATION SOFTWARE.
• DISCUSS THE THREE KINDS OF SYSTEM SOFTWARE PROGRAMS.
• DISTINGUISH BETWEEN BASIC AND SPECIALIZED APPLICATION SOFTWARE.
• IDENTIFY THE FOUR TYPES OF COMPUTERS AND THE FOUR TYPE OF MICROCOMPUTERS.
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OBJECTIVES (CONTINUED)
• DESCRIBE THE DIFFERENT TYPES OF COMPUTER HARDWARE INCLUDING THE SYSTEM UNIT, INPUT, OUTPUT, STORAGE, AND COMMUNICATION DEVICES.
• DEFINE DATA AND DESCRIBE DOCUMENT, WORKSHEET, DATABASE, AND PRESENTATION FILES.
• EXPLAIN COMPUTER CONNECTIVITY, THE WIRELESS REVOLUTION, AND THE INTERNET.
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INTRODUCTION
• WHAT IS COMPUTER COMPETENCY?• MICROCOMPUTERS ARE TOOLS FOR WORK AND PLAY• NEW FORMS OF LEARNING HAVE DEVELOPED• NEW WAYS TO COMMUNICATE AND REACH OUT TO
PEOPLE ARE AVAILABLE
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PARTS OF AN INFORMATION SYSTEM
1. PEOPLE2. SOFTWA
RE3. HARDWA
RE4. DATA
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PEOPLE
• MOST IMPORTANT PART OF ANY SYSTEM• CONTACT IS …
• DIRECT• INDIRECT
• COMPUTER USES• BUSINESS & ENTERTAINMENT• EDUCATION & MEDICINE• INFINITE
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SOFTWARE
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SOFTWARE
• AKA PROGRAMS • TWO MAJOR KINDS OF SOFTWARE
• SYSTEM SOFTWARE (OPERATING SYSTEMS RELATED)
• APPLICATION SOFTWARE (PROGRAMS)
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SOFTWARE• SYSTEM SOFTWARE – MICROSOFT WINDOWS
• LINUX (& ITS DISTRUBUTIONS)• MAC OS X• WINDOWS 7 • WINDOWS 8• WHAT ARE THE DIFFERENT VERSION OF
WINDOWS?• APPLICATION SOFTWARE – MICROSOFT OFFICE
• CORE APPLICATIONS – WORD, EXCEL, ACCESS, AND POWERPOINT
• PERSONAL INFORMATION MANAGER – OUTLOOK
• OTHER APPLICATIONS – DREAMWEAVER AND PUBLISHER 9
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SYSTEM SOFTWARE: OPERATING SYSTEMS
• WHAT DO THEY DO?• PROVIDE USER
INTERFACE• INTERFACE
BETWEEN HARDWARE AND SOFTWARE
• RAM MANAGEMENT• HARD DRIVE
MANAGEMENT
• PROCESS MANAGEMENT
• NETWORK CONNECTIONS
• UTILITIES:• DISK CLEANUP• DEFRAG• WINDOWS
EXPLORER• OTHERS…
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APPLICATION SOFTWARE• “END-USER” SOFTWARE• TWO MAJOR CATEGORIES
• BASIC APPLICATION OR GENERAL PURPOSE
• SPECIALIZED APPLICATIONS• DON’T SEE TOO OFTEN• MOST PROGRAMMERS
WORK ON THESE.• EXAMPLES?
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DATA
• RAW, UNPROCESSED FACTS• PROCESSING CREATES INFORMATION• STORED ELECTRONICALLY IN FILES
• DOCUMENT FILES• WORKSHEET FILES• DATABASE FILES• PRESENTATION FILES
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DOCUMENT FILES• CREATED BY WORD
PROCESSORS TO SAVE DOCUMENTS SUCH AS MEMOS, TERM PAPERS, AND LETTERS
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WORKSHEET FILES• CREATED BY ELECTRONIC SPREADSHEETS TO
ANALYZE THINGS LIKE BUDGETS AND TO PREDICT SALES
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DATABASE FILES• TYPICALLY CREATED BY DATABASE
MANAGEMENT PROGRAMS TO CONTAIN HIGHLY STRUCTURED AND ORGANIZED DATA
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PRESENTATION FILES• CREATED BY
PRESENTATION GRAPHICS PROGRAMS TO SAVE PRESENTATION MATERIALS. FOR EXAMPLE, A FILE MIGHT CONTAIN AUDIENCE HANDOUTS, SPEAKER NOTES, AND ELECTRONIC SLIDES.
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HARDWARE
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TYPES OF COMPUTERS
• CLUSTERS• SUPERCOMPUTERS• MAINFRAME COMPUTERS• MICROCOMPUTERS• TABLET
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TYPES OF MICROCOMPUTERS
• DESKTOP• NOTEBOOK
OR LAPTOP• TABLET PC
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DESKTOP COMPUTERS
• ARE SMALL ENOUGH TO FIT ON TOP OF OR ALONGSIDE A DESK YET ARE TOO BIG TO CARRY AROUND
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NOTEBOOK OR LAPTOP COMPUTERS• NOTEBOOK COMPUTERS, ALSO KNOWN AS LAPTOP
COMPUTERS, ARE PORTABLE, LIGHTWEIGHT, AND FIT INTO MOST BRIEFCASES
• ADVANTAGES & DISADVANTAGES COMPARED TO A DESKTOP?
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PC TABLET• IS A TYPE OF NOTEBOOK COMPUTER THAT ACCEPTS
YOUR HANDWRITING AND SENSES TOUCH. THIS INPUT IS DIGITIZED AND CONVERTED FOR FURTHER PROCESSING BY PROGRAMS.
• OTHER DIFFERENCES
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MICROCOMPUTER HARDWARE• FOUR BASIC
CATEGORIES OF EQUIPMENT:- SYSTEM UNIT- INPUT/OUTPUT- SECONDARY STORAGE- COMMUNICATION
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INPUT/OUTPUT• COMMON INPUT DEVICES ARE THE KEYBOARD AND
THE MOUSE• OTHERS?• COMMON OUTPUT DEVICES ARE PRINTERS AND
MONITORS• OTHERS
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SYSTEM UNIT
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THE MICROPROCESSOR
• ORIGINAL CHIPS WERE NUMBERED• 8086, 80286, 80386, 80486• YOU COULD BUY CHIPS FROM MULTIPLE VENDORS
• INTEL TRADEMARKED ITS CHIP AS THE PENTIUM• PENTIUM II, PENTIUM III, PENTIUM IV• CLOCK SPEED (MHZ OR GHZ) DIFFERENTIATES CHIPS• DUAL CORE, QUAD CORE
• THE CENTRAL PROCESSING UNIT (CPU)
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MEMORY (AKA RAM)• TRANSIENT (ERASED WHEN POWER TURNED OFF)• CONSIDER A UPS
(UNINTERRUPTED POWER SUPPLY)• MEASURED IN BYTES
• 1 KILOBYTE = 210 CHARACTERS (~1,000 BYTES)• 1 MEGABYTE = 220 CHARACTERS (~1,000,000
BYTES)• 1 GIGABYTE = 230 CHARACTERS (~1,000,000,000
BYTES)• COMES WITH 2GB UP TO 16GB OF RAM
• KEEP MULTIPLE PROGRAMS & DATA FILES IN MEMORY
• GRAPHIC-INTENSIVE PROGRAMS DEMAND A LOT OF MEMORY
• THE ORIGINAL PC HAD 16KB OF MEMORY 27
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AUXILIARY STORAGE• UNLIKE MEMORY,
SECONDARY STORAGE HOLDS DATA AND PROGRAMS EVEN IF ELECTRICAL POWER IS NOT AVAILABLE
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AUXILIARY STORAGE
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Hard (fixed) disk 1 TB and higher
Removable storage CD-ROM CD-R/CD-RW DVD/DVD-R/DVD-RW Tape (common for
backups) Flash Drives & SD Cards Outdated
Zip disks Floppy Disks
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HOW COMPUTERS WORK
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RAM
Hard Drive
HOW SYSTEM HARDWARE INTERACTS
CPU
CD , DVD, Flash Drive
Input Output
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WHAT’S THE STORY WITH BINARY?
• ALL COMPUTERS COMMUNICATE USING BINARY• WHAT IS BINARY?• HOW ITS USED IN COMMUNICATION• WHAT IF ALL WE HAD WERE TWO LIGHT BULBS
EXAMPLE• ASCII CHART
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INSIDE THE PC• ALL COMPUTERS ARE BASED
ON THE BINARY NUMBER SYSTEM
• A BIT OR BINARY DIGIT HAS ONE OF TWO VALUES, ZERO OR ONE
• A BYTE IS THE SMALLEST ADDRESSABLE UNIT OF MEMORY (8 BITS)
• ASCII PROVIDES FOR 256(OR 28) CHARACTERS• 01000001 – A• 01000010 – B• ETC.
• WHY NOT JUST SPEAK ENGLISH? 34
On
Off
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NETWORKING
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CONNECTIVITY, THE WIRELESS REVOLUTION, AND THE INTERNET
• CONNECTIVITY• SHARING OF INFORMATION • WIRELESS COMMUNICATION
IS BECOMING POPULAR• COMPUTER NETWORKS
• CONNECTED COMMUNICATION SYSTEM OF COMPUTERS
• LARGEST NETWORK IS THE INTERNET
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COMMUNICATIONS• COMMUNICATION DEVICES ENABLE MICROCOMPUTERS
THE ABILITY TO COMMUNICATE WITH OTHER COMPUTER SYSTEMS ACROSS THE GLOBE
• THE MODEM (SHORT FOR MODULATOR/DEMODULATOR) IS THE MOST WIDELY USED COMMUNICATION DEVICE
• MODEMS MODIFY TELEPHONE COMMUNICATIONS INTO A FORM THAT CAN BE PROCESSED BY A COMPUTER
• MODEMS ALSO MODIFY COMPUTER OUTPUT INTO A FORM THAT CAN BE TRANSMITTED ACROSS STANDARD TELEPHONE LINES
• NETWORK CARD – WIRELESS AND WIRED (ETHERNET)
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NETWORKS• WHAT IS A NETWORK?• WHY DO ORGANIZATIONS LIKE EDINBORO HAVE
THEM?• COMMON PROTOCOL – ETHERNET
• HOW DOES IT WORK?• GROUP OF PEOPLE TALKING
• WHERE ELSE USES THEM • GAS STATION• ATM
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THE INTERNET AND WORLD WIDE WEB
• THE INTERNET• NETWORK OF
NETWORKS• BEGAN IN 1969 AS A
GOVERNMENT PROJECT
• ORIGINAL NETWORK HAD 4 COMPUTERS;
• NO CENTRAL AUTHORITY AND THUS IMPOSSIBLE TO KNOW THE EXACT SIZE
• THE WORLD WIDE WEB• A SUBSET OF THE
INTERNET CONSISTING OF COMPUTERS THAT STORE HYPERTEXT DOCUMENTS
• INVENTED BY TIM BERNERS LEE WHO WANTED TO SHARE NOTES WITH COLLEAGUES AT THE EUROPEAN PARTICLE PHYSICS LABORATORY (CERN) IN SWITZERLAND
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INTERNET• BRIEFLY HOW DOES IT WORK• PROTOCOLS• TCP/IP – TRANSMISSION CONTROL
PROTOCOL/INTERNET PROTOCOL (LANGUAGE OF THE INTERNET)
• IP ADDRESS – INTERNET PROTOCOL ADDRESS• HTML – ALL WEB PAGES WRITTEN IN• HTTP – HYPER TEXT TRANSFER PROTOCOL• HTTPS –HTTP SECURE• ISP – INTERNET SERVICE PROVIDER
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http://gargasz.info/wp-content/uploads/2009/12/what-is-dns-diagram1.jpg
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A WEB SITE
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Web address (or URL)
Internet Explorer is the browser
HTTP protocol
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INTERNET
• WHAT ELSE RUNS ON THE INTERNET BESIDES THE WORLD WIDE WEB?• E-MAIL• VOIP• IRC• TELNET• FILE SHARING
(TORRENTS)
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KNOWING HOW TO PURCHASE A PC
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PURCHASE OF A PC (1)
• WHAT TO CONSIDER• HOW MUCH CAN YOU SPEND?• DESKTOP OR LAPTOP?• WHAT WILL IT BE USED FOR?• HARDWARE
• RAM• HARD DRIVE SIZE• SCREEN SIZE• NETWORK CARD
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PURCHASE OF A PC (2)
• SOUND CARD• VIDEO CARD
•DOES IT HAVE MEMORY?• PROCESSOR SPEED• PROCESSOR TYPE
• APPLE VS. PC (IBM CLONE)• WHAT IS AN IBM CLONE?
• ASSIGNMENT 2
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Components SpecificationsProcessor Intel Core Duo 2GHz, i5 or i7
Intel Centrino; Intel CeleronAMD AMD64; AMD Turion
Video Card 2 Screen; GammingMemory 2 Gig at leastFloppy Disk Drive Not used any moreHard Drive Desktop – 150 GB
Laptop – 80 GBCD, DVD, R/RW CD/DVD – Re-Writeable
Networking Wired – Ethernet CardWireless – 802.11g
Warranty ?Software Operating System
Office ProductsFree-WareAnti-Virus
Monitor LCDPrinter Color or not
If color want high dpiMany colors
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FILE MANAGEMENT
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DISK AND FILE MANAGEMENT• A FILE IS A SET OF INSTRUCTIONS OR DATA
• PROGRAM FILE: MICROSOFT WORD OR MICROSOFT EXCEL
• DATA FILE: DOCUMENT OR WORKBOOK• COPY, MOVE, RENAME OR DELETE A FILE• A FOLDER ALLOWS US TO ORGANIZE OUR FILES
• MAY CONTAIN FILES AND/OR OTHER FOLDERS• A BACK UP STRATEGY IS CRITICAL
• WHAT (DATA), WHEN (WHENEVER IT CHANGES), WHERE (OFF SITE), HOW (WINDOWS EXPLORER), AND WHO (YOU)
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WINDOWS EXPLORER EXERCISE(ASSIGNMENT 1)
• RUN THE PROGRAM• MAKE FOLDERS• MAKE SUB-FOLDERS• GOOD NAMING
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ANTIVIRUS SOFTWARE
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A computer virus is an actively infectious program that can erase data and/or alter the way your computer works
Worms and Trojan horses are other types of infectious programs, but all are bad
Computer viruses are spread through email, and/or infected floppy disks
Windows does not include an antivirus program; i.e., you must buy it separately and update it frequently
Should you get antivirus software?
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FILE COMPRESSION• USE WINZIP (OR
COMPATIBLE) PROGRAM TO CREATE A COMPRESSED FILE OR ARCHIVE
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Create a self-extracting file from the archive that does not require supporting software
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QUESTIONS / DISCUSSION
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DISCUSSION QUESTIONS• EXPLAIN THE FIVE PARTS OF AN INFORMATION
SYSTEM. WHAT PART DO PEOPLE PLAY IN THIS SYSTEM?
• WHAT IS SYSTEM SOFTWARE? WHAT KINDS OF PROGRAMS ARE INCLUDED IN SYSTEM SOFTWARE?
• DEFINE AND COMPARE BASIC AND SPECIALIZED APPLICATION SOFTWARE. DESCRIBE SOME DIFFERENT TYPES OF BASIC APPLICATIONS. DESCRIBE SOME TYPES OF SPECIALIZED APPLICATIONS.
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DISCUSSION QUESTIONS• DESCRIBE THE DIFFERENT TYPES OF
COMPUTERS. WHAT IS THE MOST COMMON TYPE? WHAT ARE THE TYPES OF MICROCOMPUTERS?
• WHAT IS CONNECTIVITY? HOW ARE THE WIRELESS REVOLUTION AND CONNECTIVITY RELATED? WHAT IS A COMPUTER NETWORK? WHAT IS THE INTERNET? WHAT IS THE WEB?
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SAMPLE QUIZ ON THE WEB SITE