COSC 1301 Introduction Plan for Today: Review course policies and coverage Homework, Projects and Exams Class Communication Computers and the Internet: In Our Lives Brief Introduction to Chapter 1: Computers then and now

Homework and Projects Written assignments to turn in during class News articles on class material: turn in hard copy of article, and be prepared to summarize it in class on due date Electronically submitted assignments via Dropbox via Blackboard Python Programs We will use Python 3 Optional reference: Python Programming for the Absolute Beginner (3rd edition) by Dawson Webpages (using HTML and CSS)

Class Documents Course Description Here: http://faculty.stedwards.edu/jbryan2/cosc1301/cosc1301- courseInfo.html Course Schedule Here: http://faculty.stedwards.edu/jbryan2/cosc1301/cosc1301- schedule.html Office Hours Here: http://faculty.stedwards.edu/jbryan2/officeHours.html Class Notes and Slides: NOT posted and not given out. You must come to class or get with another student to copy notes.

Exams Three in-class midterm exams Final exam Cover material from lecture, textbook, homework and projects Final exam During final exam period – date and time assigned by university All exams are equally weighted I typically allow the use of one 3X5 card with notes for exams

Communication Email: jbryan2@stedwards.edu (Best way to contact me; fastest response) Office hours: http://myweb.stedwards.edu/jbryan2/officeHours.html JBWS 280 Phone: 512-464-8834

Electronic Devices In Class No electronic devices in class, including laptops, cell phones, Ipads or any other device We will have exercises in class on the computers around the edge of the classroom

What Will You Learn? Create web pages The parts of a computer (hardware and software) Basics of networking Basics of security Discussions on privacy Basics of programming (using Python) Primary Goal: Reveal the mysteries of how computers work

This Class How do we store data (pictures, videos, text, etc) in a computer, what are the physical/electronic parts of a computer, how do we give instructions to a computer, etc. Image from textbook slides

Ancient History: Computers: Then… The IBM 360: 1960s and 1970s http://plyojump.com/classes/mainframe_era.php Photograph from Computer History Museum Approximately 2 MB (1/500 GB) of memory

Computers: Then and Now Circa 1970: 1/500 GB What’s next? 2050? 2013: 16 GB

Moore’s Law Not actually a law Observation by George Moore, Intel co-founder, that: # of transistors on integrated circuit seems to double every two years Corresponding exponential increase in processing speed and memory capacity

Moore’s Law http://en.wikipedia.org/wiki/Moores_law http://en.wikipedia.org/wiki/File:Transistor_Count_and_Moore’s_Law_-_2011.svg Transistor counts per integrated circuit, for year of introduction y-axis scale is logarithmic, so growth is exponential.

Computing Power: Now http://commons.wikimedia.org/wiki/File:Rice_p1160004.jpg Computing power and connections between computers growing very fast. Cost: 1 grain of rice == 125k transistors Transistor: electronic switch that’s either on or off Many times more transistors produced each year than number of grains of rice consumed. Plus: A transistor is cheaper than a grain of rice!

Your “Computers” What was your first computer? Mine: PC with 8088 Processor No hard drive Two 5.25 inch floppy disks 8 bit data bus Could only address 1mb of memory Cost: $2200 What “computers” do you use regularly now? http://en.wikipedia.org/wiki/Apple_Iie, via allaboutapple.com Digital camera, DVD player, tablet, laptop, GPS navigator, ATM, google glass

Computer Programming: Then… Through 1970s: Programs on Punch Cards http://en.wikipedia.org/wiki/Computer_programming_in_the_punched_card_era One card per program instruction. Each character in the program statement encoded per column – the first character, Z, is encoded as 001000000001

Computer Programming: Then… Assembly Language Program: Prints the message “HELLO WORLD” to the console HELLO CSECT The name of this program is 'HELLO' * Register 15 points here on entry from OPSYS or caller. USING *,12 Tell assembler which register we are using for pgm. base STM 14,12,12(13) Save registers 14,15, and 0 thru 12 in caller's Save area LR 12,15 Set up base register with program's entry point address LA 15,SAVE Now Point at our own save area ST 15,8(13) Set forward chain ST 13,4(15) Set back chain LR 13,15 Set R13 to address of new save area * -end of housekeeping (similar for most programs) - WTO 'Hello World' Write To Operator (Operating System macro) * L 13,4(13) restore address to caller-provided save area LM 14,12,12(13) Restore registers as on entry SR 15,15 Set register 15 to 0 so that the return code (R15) is Zero BR 14 Return to caller SAVE DS 18F Define 18 fullwords to save calling program registers END HELLO This is the end of the program http://en.wikipedia.org/wiki/IBM_Basic_assembly_language_and_successors

Computer Programming: Now We’ll write the “Hello World” program in Python: def main(): print(“Hello World”) main()

Why Not English? Why can’t we just write our programs in English? English is ambiguous What does “Feed the cat John” mean? And: “We saw her duck” Google “English structure”: hierarchical structure of the government in Great Britain structure of sentences in the English language etc.

Where are the Computers? 1960s/ 1970s Today iphone photo courtesy of Brett Jordan: http://www.flickr.com/photos/55497864@N00/6253647584 IntelliSeat photo courtesy of Elaine Rich (programmable toilet) …

What’s Next? Car That Can Gossip? Photo courtesy of Peter Stone: http://www.cs.utexas.edu/~AIM http://www.ted.com/talks/jennifer_healey_if_cars_could_talk_accidents_might_be_avoidable