Plan for Today:
Review course policies and coverage
Homework, Projects and Exams
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
We will use Python 3
Optional reference: Python Programming for the Absolute Beginner (3
edition) by Dawson
Webpages (using HTML and CSS)
class midterm exams (24% each)
Cover material from lecture, textbook, homework and projects
Final exam (25%)
During final exam period
date and time assigned by university
Class discussion on piazza:
iazza is a class communication tool
student and instructor edited Q&A
If you have a question of general interest between class meetings, post it on
then everyone gets to see the answer.
Do not post homework/project solutions
topic posts or disrespectful posts
Email: marye at stedwards.edu (much preferred to phone calls)
Office hours: Mondays 10
11, Wednesdays 2
3 or by appointment
(please email me)
Ancient History: Computers:
The IBM 360:
1960s and 1970s
Approximately 2 MB (1/500 GB) of memory
Computers: Then and Now
Circa 1970: 1/500 GB
Not actually a law
Observation by George Moore, Intel co
# of transistors on integrated circuit seems to double every two years
Corresponding exponential increase in processing speed and memory
Computing Power: Now
Many times more transistors produced each year than number of grains of rice consumed.
Plus: A transistor is cheaper than a grain of rice!
What was your first computer?
What “computers” do you use regularly now?
Computer Programming: Then…
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…
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
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
to save calling program registers
END HELLO This is the end of the program
Assembly Language Program: Prints the message “HELLO WORLD” to the console
Computer Programming: Now
We’ll write the “Hello World” program in Python:
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
Where are the Computers?
What can Computers do?
Beat former champs at Jeopardy!
'A machine like that is like 500,000 of me sitting at Google and
Herbert Chase, M.D., Columbia University
Autonomous traffic management