Introduction & Operating Systems
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Introduction & Operating Systems
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What a computer is?
What cheating is?
What a GUI is?
Do you know:
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Introduction
• Housekeeping—Changes to Syllabus• Grading—three MPs and three exams• Handing in work online
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https://agora.cs.uiuc.edu/display/cs105/
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Writing an email to an instructor
• Go to Web Preferences
• Add a Signature!• Include earlier
email in yours
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What is a computer?
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This course only deals with electronic computing machines
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Computers have REALLY changed over time!
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Hardware
• Hardware– “The parts of a computer system that can be
kicked.” —Henri Karrenbeld
– Example of a kicking
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Hardware CS105 Spring 2010# 7
Inputs
RAM Chip
keyboard
Outputs
CPU on a chip – the Microprocessor (s)
ROM built in, BIOS
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You will read about secondary storage in your text.
• Secondary storage includes hard drives, CD-ROMs, DVDs, and Flash Memory cards like you find in cell phones, digital cameras, etc.
• Most secondary storage will maintain its data without any external source of power.
• See Unit B in your Computer Concepts book, Computer Hardware
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What can do wrong with hardware?• Memory, disks, CD-ROM drives, floppy drives, video
cards, mother boards, CPUs, fans, power supplies, monitors, disk controllers can all FAIL!
• Rarely, chips can make calculation errors.
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# 10
Software in a Computer
computerhardware
Windows Vista
Applications
• Software : Instructions or Computer Programs
• Hardware: Electronic Devices & Circuits
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What is an Operating System?
• Hardware needs a manager to tell it – what to do– when to do it– how to do it
• The (OS) controls all• A: Input• B: Output
• C: processing• It manages the data and the memory and
appearance
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Operating Systems Software
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Windows VistaUNIX (LINUX)Mac OS X
Handhelds --Palm OS
UNIXfor email servers
iPods
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Power of an Operating System
• An operating system produced by one company can intentionally make it difficult to use software programs produced by another company
• For those people wary of Microsoft, Linux is a free Unix-type operating system originally created by Linus Torvalds with the assistance of developers around the world.
• More information here: http://www.linux.org/
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Interface—Graphical, using Icons
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The iPhone has an unusual user interface (for a phone)--GUI
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Cheating• The penalty for cheating will be 0 on the MP or exam, an F in the
course if caught twice.
• Passively allowing someone to copy your work is cheating.
• More than 3 students working on an MP is cheating.
• It is cheating to show an MP or honors project to someone else.
• Ignorance of the law is no excuse…
http://admin.illinois.edu/policy/code/article_1/a1_1-402.html
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More on cheating• Question: Am I cheating if
another group turns in my work and says they did it?
• Yes. We are not blessed with "lie detectors.“ Keep other people out of your laptop or computer, keep it password protected.
• *Don’t tell people your password (duh)
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To Summarize:• What is a computer ?
• What is a GUI?
• What is cheating?
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