CS 1104 INTRODUCTION TO COMPUTER SCIENCE J.A.N. Lee Professor of Computer Science Good morning I am JAN Lee, professor of Computer Science at Virginia Tech and administrator of this course - CS 1104 Introduction to Computer Science. This semester this course is restricted to Computer Science majors and we will be emphasizing computer science as career and those aspects of the science that compose the topic. (click) 11/20/2018 What is Computer Science?

What is Computer Science? Have you? Checked out the course web site? Downloaded and installed the Macromedia Flash plug-in? Verified that you are on the LISTSERV® address list? Registered with the WebCT system? Completed the pre- and post-class activities? 11/20/2018 What is Computer Science?

What is Computer Science? 11/20/2018 What is Computer Science?

What is Computer Science? The Components Computers and computing only just over 50 years old Computer Science is about 40 years old Still developing and expanding 11/20/2018 What is Computer Science?

6 Blind Men and an Elephant 11/20/2018 What is Computer Science?

What is Computer Science? 5 Faculty and a Science 11/20/2018 What is Computer Science?

What Computer Science is NOT! (Totally) Programming in C++ or Java. Text editing or word processing. Using spread sheets or any other applications. Browsing the web. Developing interactive arcade games 11/20/2018 What is Computer Science?

Definition of Computer Science Computer Science is the study of algorithms, including their: Formal and mathematical properties Hardware realizations Linguistic realizations Applications And one more ... 11/20/2018 What is Computer Science?

What is Computer Science? Lee’s Law The Law: Everything in Computer Science can be categorized into groups of five components (otherwise known as quintuples). Corollary: If not fix it! 11/20/2018 What is Computer Science?

What is Computer Science? The Missing Item Computer Science is the study of algorithms, including their: Formal and mathematical properties Hardware realizations Linguistic realizations Applications Ethical Usage and Social Impact 11/20/2018 What is Computer Science?

Alternate Definition of Computer Science The study of information, its representation, organization, manipulation, and transformation to accomplish some end. The manipulation and transformation is accomplished by computation, which is specified as algorithms. 11/20/2018 What is Computer Science?

Is Computer Science REALLY a Science? The systematic observation of natural events and conditions in order to discover facts about them and to formulate laws and principles based on these facts. The organized body of knowledge that is derived from such observations and that can be verified or tested by further investigation. Any specific branch of this general body of knowledge, such as biology, physics, geology, or astronomy. (From the Latin word meaning “knowledge.”) Source: Academic Press Dictionary of Science Technology 11/20/2018 What is Computer Science?

Comparison to Physics - I 11/20/2018 What is Computer Science?

Comparison to Physics - II 11/20/2018 What is Computer Science?

We can make other comparisons Biology - has many scales of size from microbiology to environmental biology Engineering - has many levels of concept from electronics to construction Mathematics - has synthesis and decomposition Philosophy - has fundamental truths 11/20/2018 What is Computer Science?

Or Is Computer Science an APPLIED Science? Our work is dependent on more fundamental sciences Our “objects of study” are man-made Our laws are the laws of application The laws of CS are frequently violated by human error! 11/20/2018 What is Computer Science?

Computer Science Builds on Other Disciplines Mathematics Philosophy Physics Computer Science Sociology Chemistry Engineering Linguistics 11/20/2018 What is Computer Science?

HIERARCHIES OF INTEREST There are other levels of interest in CS. For example, there is a hierarchy of languages: High level languages Assembly language Machine language Microcode VERY HIGH LEVEL LANGUAGES! EXCEL, ACCESS What is missing? 11/20/2018 What is Computer Science?

A hierarchy of computer science 1. Algorithmic foundations 2. Hardware world 3. Virtual machines 4. Software world 5. Social issues This is the general hierarchy that we will use in this course 11/20/2018 What is Computer Science?

Computer Science At Virginia Tech The courses we teach: http://courses.cs.vt.edu The course requirements for graduation: http://www.cs.vt.edu/academics/ugrad/ 2003checksheet.html The interests and research of our faculty 11/20/2018 What is Computer Science?

The Lower Division Courses CS1044: Introduction to Programming CS1104: Introduction to Computer Science CS1204, 2204: Operating System Tools I, II CS1604: Computers and Networked Information CS1704: Introduction to Data Structures & Software Engineering CS2604: Data Structures and File Processing CS2704: Object-Oriented Software Design and Construction 11/20/2018 What is Computer Science?

What is Computer Science? The Junior Courses CS3204: Operating Systems CS3304: Comparative Languages CS/Math 3414: Numerical Methods CS3604: Professionalism in Computing CS3704: Software Engineering CS3724: Introduction to Human-Computer Interaction 11/20/2018 What is Computer Science?

What is Computer Science? The Senior Courses - I CS4104: Data and Algorithm Analysis CS4114: Formal Languages CS4124: Theory of Computation CS4204: Computer Graphics CS4214: Simulation and Modeling CS4234: Parallel Computation CS4414: Issues in Scientific Computing CS4504: Computer Organization 11/20/2018 What is Computer Science?

What is Computer Science? The Senior Courses - II CS4304: Compilers and Translators CS4604: Introduction to Database Management Systems CS4624: Multimedia, Hypertext and Information Access CS4704: Software Engineering CS4804: Introduction to Artificial Intelligence CS4984: WWW - The Underlying Technology 11/20/2018 What is Computer Science?

What is Computer Science? Research Interests Center for Human-Computer Interaction Digital Libraries Research Laboratory Internet Technology Innovation Center Parallel Computation Laboratory Network Research Group Problem Solving Environments Group Simulation and Software Engineering Laboratory Systems Research Center 11/20/2018 What is Computer Science?

The Textbook Hierarchy 11/20/2018 What is Computer Science?

http://courses.cs.vt.edu/~cs1104/ Introduction/Chapter1.010.htm REVIEW http://courses.cs.vt.edu/~cs1104/ Introduction/Chapter1.010.htm 11/20/2018 What is Computer Science?