1 nd Semester Module1 Introduction to Computer and Programming Thanawin Rakthanmanon Create by: Aphirak Jansang Computer Engineering Department Kasetsart University, Bangkok THAILAND

1 nd Semester Outline  Introduction to Computer  Programming Languages

1 nd Semester Definition of Computer  Devices for performing computations at high speeds with great accuracy  A machine that can be programmed to manipulate symbols  Physical components are known as “Hardware”

1 nd Semester Computer Systems  Hardware (HW) Actual physical machines (equipment) that make up the computer (e.g. monitor, keyboard)  Software (SW) Programs written for a specific application are often called softwares (e.g. Window XP, Linux, Microsoft word)

1 nd Semester Computer Categories  Personal Computer Desktop Computer Notebook PDA – Personal Digital Assistant  Supercomputer  Mainframe High Computation Power

1 nd Semester Computer Components  Input Devices  Output Devices  Computing & Processing Unit

1 nd Semester Input Devices HD CPU Main Memory Secondary Memory (DVD, FDD, HDD) Computer Components (details) *CPU= Central Processing Unit Output Devices

1 nd Semester Computer Components (pictures) Hard discCPU

1 nd Semester Computer Memory  1.Main Memory  2.Secondary Memory

1 nd Semester Main Memory  Can be divided into 2 Categories RAM (Random Access Memory) ROM (Read Only Memory)  Memory Cell -> Byte -> bit  1 Byte = 8 bits

1 nd Semester Secondary Memory  Floppy disk  Hard disk  CD-ROM, CD-R, CD-RW  DVD-ROM, DVD-R, DVD-RW Etc… 1 Kbyte = 2 10 = 1024 bytes 1 Mbyte = 2 20 = 1,048,576 bytes 1 Gbyte = 2 30 = 1,073,741,824 bytes

1 nd Semester Data Representation  Data in computer is represented in “ bit” bit = binary digit  0 or 1 Byte = 8 bits 1 byte can represent many kids of data  1 byte =  the above 1 byte means, “a” or 97  the meaning of 1 byte depends on the program

1 nd Semester Main Memory VS Secondary Memory  Main Memory Much faster More expensive Volatile  Secondary Memory Slower Less expensive Permanent

1 nd Semester Outline  Introduction to Computer  Programming Languages

1 nd Semester Programming Languages  Program A set of instructions for a computer to follow, written in specific programming language  Types of programming language High-Level Language Assembly Language Machine Language

1 nd Semester High-level VS Assembly VS Machine Language  High-level Language Nearly like human word SUM := A * 2 + ALPHA/3;  Assembly Language Some key words are understandable MULL3A, #2, R ADDL3R6, R7, SUM  Machine Language Only “0” and “1” Computer itself understands only Machine language

1 nd Semester High-Level Languages  Procedural Language Fortran Cobol Basic C Pascal  Object-Oriented Language C++ Java C# C#  Functional Language Lisp  Logic Language Prolog

1 nd Semester Summary  Basis of Computer  Programming Language

1 nd Semester Tips  Links  How to check MAC address of your PC Click “run” (from start button) “ cmd ” Type “ ipconfig /all ”  Physical address : E5-xx-xx-xx