Computer Science Studies (BIT)

This fourm is created by Sir Muhammad Tahir Farooq. The purpose of creating this fourm to share information the students.
 
HomeHome  RegisterRegister  Log inLog in  
Aslam-O-Alikum!
Search
 
 

Display results as :
 
Rechercher Advanced Search
Calender
Latest topics
» Chapter #1 Complete MCQ's (PART-1)
Tue Feb 24, 2015 6:00 am by Shaheer

» Windows Operating System (COMPLETE)
Mon Jan 26, 2015 10:17 am by shaista

» Computer Architecture (COMPLETE)
Sun Jan 25, 2015 5:52 am by shaista

» A virus that create more folders in your computer
Tue Jan 06, 2015 3:49 am by tahir48

» Browsers Comparision
Tue Jan 06, 2015 3:39 am by tahir48

» WEb to PDF convert
Sun Jan 04, 2015 7:34 am by shaista

» 7th Class Computer paper 1st 2 Chapters
Mon Dec 08, 2014 6:21 pm by shaista

» 8th Class Computer Paper 1st 2 chapters
Mon Dec 08, 2014 6:16 pm by shaista

» Chapter # 1 9th Class
Mon Dec 08, 2014 2:52 am by shaista

Poll
Top posters
Admin
 
shaista
 
tahir48
 
computerstudent18
 
computerstudent29
 
thompson john
 
Shaheer
 
Statistics
We have 30 registered users
The newest registered user is benish

Our users have posted a total of 214 messages in 210 subjects
Flag Counter

Share | 
 

 Micro Computers

Go down 
AuthorMessage
tahir48



Posts : 47
Join date : 2012-10-31

PostSubject: Micro Computers   Sun Sep 15, 2013 7:08 pm

Micor Computers

Introduction

Computers are the electronic devices that can follow instructions to accept input process that input and produce information. From capability point of view there are four types of computers as mentioned in the previous chapter.
1. Micro Computers
2. Mini Computers
3. Mainframe Computers
4. Super Computers

1. Micro Computers
The most widely used and fastest growing type of computer is the micro computer. There are two categories of micro computers desktop and portable. Desktop computers are small enough to fit along the side of a desk and yet are too big to carry around. Personal computer are the type of desktop. Portable computers are the micro computers that are small enough and light enough to move from one place to another. There are four categories of portable computers.
i. Laptops
ii. Notebooks
iii. Sub notebooks
iv. Personal Digital Assistants.


Components of Computer

The computer itself the hardware has many parts but each fall into one of four categories.
1. Processor
2. Memory
3. Input and Output Devices
4. Storage Devices.
Only first two categories will be discussed in this chapter, whereas next two categories will be studied in the subsequent chapter.


The CPU or Processor

The part of the computer that runs the program (executes processor) is known as the processor or central processing unit. The processor is like the brain of the computer the part that organizes and carries out the instructions that come from either user or software. The central processing unit has two components the control unit and the arithmetic logic unit.


Control Unit

The Control unit tells the rest of the computer system how to carry out a program's instruction. It directs the movement of the electronic signals between teh memory which temporarily holds data, instruction and processed information and the arithmetic logic unit. It also direct the signal between the CPU and the input and output devices.
@import "/extensions/GoogleAdSense/GoogleAdSense.css";

Arithmetic-logic Unit

The arithmetic logic unit usually called ALU performs two types of operations arithmetic and logical. The arithmetic operations are the fundamental math operations addition, substraction, multiplication and division. Logical operations consists of comparisons. i.e. two pieces of data are compared to see whether one is equal to (=), less than (<) or greater than (>) the other.


Memory (RAM)

Computer has two types of memory random access memory (RAM) and read only memory. (ROM) In this chapter only RAM will be studied whereas ROM will be studied later. RAM also known as primary memory internal memory or main memory hold.


  • Data for processing



  • Instruction for processing the data that is the program



  • Information that is processed data waiting to be output and sent to secondary storage such as floppy disk in a disk drive.

One of the most important fact to know about memory is that part of its content is held only temporarily. In other words, it is stored only as long as computer is turned on. When the machine is turned off the contents immediately vanish.
The next important facts of know about memory is that its capacity varies in different computers.
Back to top Go down
 
Micro Computers
Back to top 
Page 1 of 1
 Similar topics
-
» Cox Micro Servo sale @ $4.65 each!
» micro Servo substitute=musclewire
» Premna Micro/Pemphis Acidula Please!?
» Are micro organism harmful?
» TD 010 micro-flite

Permissions in this forum:You cannot reply to topics in this forum
Computer Science Studies (BIT) :: Classes :: First Year Standard-
Jump to: