Tutorial 1
Introduction to computers,
the Internet & VB .Net
What is a Computer?
Examples?
 History
 A device capable of

 Performing
computation
 Making logical decisions
 Faster than human

Process data using computer programs
What is a computer program?
A set of instructions
 a.k.a. application & software

Computer Organization
Input devices: keyboard, mouse, scanner,
microphone, digital camera, & etc.
 Output devices: monitor, printer, projector,
device control, & etc.
 Memory: Primary memory, RAM. Voatile.
 Arithmetic & logic unit (ALU): Performs
calculation, logical comparison, decision
making.

Continue 
Central processing unit (CPU):
Administrates process operations.
 Secondary storage: Long-term storage of
applications and data. E.g. hard drive,
CD/DVD drive , & etc.

Three Types of Languages

Machine language: A natural language of
a particular computer  machine
dependent.
+3422221207
+4060234234
+6345335372
Continue 

Assembly language: English-like.
Translator program called assembler
converts to machine language.
LOAD
BASEPAY
ADD
OVERPAY
STORE GROSSPAY

High-level language: More convenient for
programmers.
GrossPay = BasePay + OverPay
High level languages
Visual Basic .Net: Evolved from Visual
Basic. GUI. Object Oriented.
 Pascal, C, C++, C#
 COBOL
 Java
 HTML?, JavaScript?, VBScript?

Language Relationships
Refer to http://www.erg.abdn.ac.uk/users/gorry/eg2068/course/comp.html
What is .Net
A set of software technologies for
connecting information, people, systems,
and devices.
 Based on Web services—small buildingblock applications that can connect to
each other as well as to other, larger
applications over the Internet.

http://www.microsoft.com/net/basics/
Continue 
Object Oriented Programming
Example: What if the replicater does not
use OOP?
 Structure:

 Object.Property
or Object.Attribute
 Object.Behavior or Object.Method

Class: Related objects. E.g. car, wheel,
hub, bolt, & etc.