Objectives:- -Differentiate among various style of system units on desktop,laptop,and mobile computers -Identify hardware components of a motherboard -Describe the control unit and arithmetic logic unit components of a processor,and explain the four steps in a machine cycle -Identify characteristic of various personal computer processor on the market today,and describe the ways processors are cooled -Define a bit and describe how a series of bits represents data -Explain how program instructions transfer in and out of memory -Differentiate among the various types of memory -Describe the purpose and types of expansion slots and adapter cards,and differentiate among slots for various removable flash memory devices -Differentiate between a port and a connector, and explain the differences among a USB port, FireWire port, Bluetooth port, SCSI port, eSATA port, IrDA port, serial port, and MIDI port -Describe the type of buses in a computer -Explain the purpose of a power supply and describe how it keep cool -Understand how to clean a system unit on a computer or mobile device System Unit : A case that contains electronic components of the computer used to process data Component on a motherboard :- -Drive bay(s) -Power Supply -Processor -Memory -Sound card -Video Card Processor -Called central processing unit (CPU),interprets and carries out the basic instructions that operate a computer. Contain a control unit and an arithmetic logic unit (ALU). -Control unit is the component of the processor that direct and coordinates most of the operations in the computer -The Arithmetic Logic Unit (ALU) performs arithmetic ,comparison,and other operations. Four basic operations cycle : FETCH=>DECODE=>EXECUTE=>STORE ANALOG signals are continuous and vary in strength and quality DIGITAL signals are in one or two states: on or off Binary System The binary system uses two unique digit: 0 and 1 -Bits and Bytes -A computer circuits represents the 0 and 1 electronically by the presence or absence of and electrical charge.8 bits grouped together as a units are called a bytes.A bytes represent a single character in the computer. MEMORY Definition: electronic component that store instructions waiting to be executed by the processor ,data needed by those instructions ,and the results of processing data -Each location in memory has an address 2 types of memory:- -Volatile memory =Loses its content when power is turn off -Nonvolatile memory= Does not lose content when power is removed.For example ROM,flash memory,and CMOS Process of program instruction transfer between RAM Various type of RAM :- -Dynamic RAM (DRAM)=>SDRAM,DDR2,DDR3,RDRAM -Static RAM -Magnetoresistive RAM (MRAM) Expansion Slots and Adaptor Cards
PORTS
Types of buses in a computer:- -PCI Bus -PCI Express bus -Accelerated Graphics port -USB and firewire bus -PC Card bus Power Supply
Way to keep our system unit clean :- -Clean it once or twice a year -Turn off and unplug your computer or mobile device before cleaning it -Used high pressure air to blow off dust -Used and antistatic wipe to clean the exterior of the case and a cleaning solution and soft cloth to clean the screen SUMMARY
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Objective : 1.Identify the four categories of application software 2.Differentiate among the seven forms through which software is available 3.Explain how the operating system and utility programs work with application 4.Describe characteristics of a user interface 5.Identify the key features of widely used business programs 6.Identify the key features of widely used graphics and multimedia programs 7.Identify the key features widely used home,personal,and educational programs 8.Discuss the advantages of and ways to access Web applications 9.Identify the types of application software used in communications 10.Describe the learning aids available for application software Application Software Application software consists of programs designed to make users more productive and /or assist with personal task. -To make business activities more efficient -To assist with graphics and multimedia projects -To support home,personal,and educational tasks -To facilitate communications Variety forms of software:- -Packaged software (Copyright) Example: Microsoft Office -Custom software (specific function) Example: ATMs -Web Application (Allow user to use application through internet) Example: Microsoft Office Online,Whatsapp Web -Open Source software (Open publicly for use,modification) Example:Open Office -Shareware (No cost for trial period,payment need after trial) Example: WinRAR -Freeware (Copyrighted software provided at no cost to user by individual that retain all rights to the software) Example: Mozilla Firefox,Google Chrome,Skype -Public-domain software (donate for public use,no copyright) Example: Business software:-
Business Software
Graphics and Multimedia Software
Software For home,personal and educational use
Web Application Definition- A web site that allow users to access and interact with software from any computer or device that is connected to the internet Application software for communication
Learning Aids
SUMMARY
How to start and interact with application software Overview of a variety of business software,graphics and multimedia software,and home/personal/educational software Web application and application software for communication Learning tools for application software and Web-based training Objectives Overview
EVOLUTION OF THE INTERNET Internet-> The collection of worldwide networks. SEPTEMBER 1969 GOALS!!-Allow scientists at different physical locations to share information and work together. -Function even if part of the network were disabled or destroyed by a disaster 1969 APRANET => 1984 +1K host =>1986 NSFnet connect to APRANET =>1995 NSFNet resumes status as research network =>1996 Found Internet 2 => Today 550 million hosts Access Provider define as a business that provides individuals and organizations access to the internet free or a fee. High speed internet service include Cable internet service,DSL (Digital Subscriber Line),Fiber to the Premises(FTTP),Fixed Wireless,Cellular radio network,WI-FI,Satellite internet Service. ISP (Internet Service Provider): Provide internet access to a specific geographical area OSP ( Online Service Provider): Has many members-only feature Wireless Internet Service Provider : Provide wireless internet access to computer and mobile devices. How Home user data travel through the internet:- For Example : Type google in address bar=>>modem transfer data from computer to a central server=>>info passing fibre optic in high speed to the cable operator (ISP)=>>ISP route through the internet backbone to the server=>>Web page displayed IP Address is a number that uniquely identifies each computer devices connect to the internet. Domain Name is the text version of and IP Address DNS Server translate the domain name into associate IP address Example of web browser : Chrome,Safari,Internet Explorer,Mozilla firefox,Opera A Web Page have a unique address called URL or Web Address Tabbed Browsing allow us to open multiple of web pages in a single web browser. Types of search tools:- -Search Engine. Search information in a more specific way -Subject Directory. Classifies web page in an organized set of categories The 13 types of websites:-----
MULTIMEDIA
E-commerce Definition: A business transaction that occurs over an electronic network Ex: Business to Consumer,Business to Business,Consumer to Consumer Netiquette Definition : A code of acceptable Internet behaviour For Example : Emoticon,Acronym SUMMARY
Objective Overview 1.Explain why computer literacy is vital to success in today's world. 2.Define the term,computer,and describe the relationship between data and information. 3.Describe the five components of a computer. 4.Discuss te advantages,and disadvantages that users experience when with computers. 5.Define the term,network, and identify benefits of sharing resources on a network. 6.Discuss the uses of the Internet and World Wide Web. 7.Distinguish between system software and application software. 8.Differentiate among types,sizes,and function of computers in each category. 9.Describe the role of each element in an information system. 10.Explain how home users,small office/home office users,and enterprise users each interact with computers. 11.Discuss how society uses computers in education,finance,government,health care,science,publishing,travel,and manufacturing. Computers are everywhere in the world Definition: A computer is an electronic device,operating under the control of instruction stored in its own memory. For Example, Data Collection>Process> Produce Info. Component of Computers:- -Input Device -Output Device -Storage Device -System Unit -Communications Device Pros and Cons of using Computers Pros:
Green Computing Definition: Reducing the electricity consumed ad environment waste generated when using a computer. Network Definition: A collection of computers and devices connected together,often wirelessly,via communications devices and transmission media. Internet Definition: Internet is a worldwide collection of networks that connect millions of individual. Variety of Internet Usage: -Communication -Shopping -Online Trading -Entertainment -Banking and Investment -Research and information access Computer Software Definition:Software,also named as PROGRAM.Instruct the computer what tasks to perform and how to perform them. Software Installation Process Step 1: Install Step 2: Run the program Step 3: Start Use Categories of Computer:-
Element of and Information System
(PEOPLE) makes (SOFTWARE) to sort (DATA) -> (PEOPLE) enter (DATA) into (SOFTWARE) to be processed -> (HARDWARE) processes (DATA) using (PROCEDURES) -> (HARDWARE) gives output Types of Computer Usage:- -Home User -Small Office/Home Office User -Mobile User -Power User -Enterprise User Computer Applications in Society:- -Education -Finance -Government -Health Care -Science -Publishing -Travel -Manufacturing SUMMARY
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