OBJECTIVE:- -Differentiate between storage media and storage devices -Describe the characteristics of an internal hard disk including capacity, platters, read/write heads, cylinders, sectors and tracks, revolutions per minute, transfer rate, and access time -Discuss the purpose of network attached storage devices, external and removable hard disks, and hard disk controllers -Describe the various types of flash storage -Describe cloud storage and explain its advantages -Describe the characteristics of optical discs -Differentiate among various types of optical discs: CDs, archive discs and Picture CDs, DVDs, and Blu-ray Discs -Identify the uses of tape, magnetic stripe cards, smart cards, microfilm and microfiche, and enterprise storage STORAGE MEDIA AND STORAGE DEVICES Storage Media:- -A physical material on which a computers keep data ,instructions and information.For example:Hard disk,microfilm,solid state drive Storage Devices:- -A computer hardware that records or write items to and from storage media Hard Disk -contains one or more inflexible ,circular platters that use magnetic particles to store data,instruction and information.It can use perpendicular recording or longitudinal recording.
CAPACITY -Number of bytes a storage medium can hold STORAGE DEVICE -A computer hardware that records and/or retrieves item to and from storage media -READING is the process of transferring items from a storage medium into memory -WRITING is the process of transferring items from memory to a storage medium ACCESS TIME -The amount of time it takes a storage device to locate an item on a storage medium -The time required to deliver and item from memory to the processor NETWORK ATTACH STORAGE (NAS) -A server connected to a network with the sole purpose of providing storage
TYPE OF FLASH STORAGE
CLOUD STORAGE- -An internet service that provides storage to computer users
CHARACTERISTICS OF OPTICAL DISC
OTHER TYPE OF STORAGE:-
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OBJECTIVES: - -Describe the type of output -Explain the characteristics of various display devices -Describe the factors that affects the quality of an LCD monitor and LCD screen -Describes various way to print -Differentiate between a non-impact printer and impact printer -Summarize the characteristics of ink-jet printers, photo printers, laser printers, multifunction peripherals, thermal printers, mobile printers, label and postage printers, and plotters and large-format printers -Describes the uses and characteristics of speakers,headphones, and earbuds. -Identify the purposes and features of data projectors,interactive whiteboards,and force-feedback game controllers and tactile output OUTPUT
DISPLAY DEVICES Definition: Visually conveys text,graphics and video information
Ways to print :-
Non-impact and Impact printer Non-Impact Printer
Ink-jet Printer -Forms characters and graphics by spraying tiny drops of liquid ink onto a piece of paper Photo Printer -Produces color photo-lab-quality pictures -Use ink jet technology Laser Printer -High speed -High quality -Color -Back and white Multifunction Peripheral (MFP) -A single devices that allow print,scan,copies,faxes. Thermal Printer -A thermal printer generates image by pushing electrically heated pins against the heat-sensitive paper Mobile Printer -Small,lightweight,battery-powered printer that allows a mobile user to print from a notebook computer,smartphone,or other mobile devices Label Printer -A small printer that prints on adhesive-type material Plotters -used to produce high quality drawing Large Format printers -Create photo-realistic quality color prints on a larger scales Characteristics of speakers,earbud and headphones: Speakers -Generate better sound quality for playing games -Interact with multimedia presentations Earbud -Rest inside the ear canal -Portability -Noice-cancelling Headphones -Speakers that a cover over our ears -Better sound experience -Comfor Other output devices: Data Projectors -A devices that makes the text and images displaying on a computer screen and projects them on a larger screen Interactive Whiteboard -A touch sensitive device,resembling a dry-erase board,that display the image on a connected computer screens Force feedback -Send resistance to the device in response to actions of the user Tactile output -Provides the user with a physical response from the device SUMMARY
OBJECTIVES:- -Define input and differentiate among a program,command,and user response -Identify the keys and buttons commonly found on desktop computer keyboards,and describe how keyboards for mobile computers and devices differ from desktop computer keyboards -Describe different mouse type -Describe various types of touch screens and explain how a touch-sensitive pad works -Describe various type of pen input,and identify other types of input of smart phones -Summarize the purpose of various game controllers -Explain how resolution affects the quality of a picture captured on a digital camera -Describe the uses of voice recognition,Web Cams,and video conferencing -Describe how various scanners and reading devices work -Summarize the various biometric devices -Discuss how POS terminals,automated teller machines ,and DVD kiosks work -Identify alternative input devices for physically challenged users INPUT Definition: Data and instructions entered into the memory of computer -Instruction can be entered into the computer in the forms of programs,command,and user programs -A program is a series of related instructions that tells a computer what takes to perform them==> Programs respond to commands that a user issues==> A user response is an instruction of a user issues by replying to a question display by a program THE KEYBOARD -Most desktop computer keyboards have between 101 and 105 keys,a numeric keypad on the right side of the keyboard,Function keys,CTRL keys,ALT keys and arrow keys,WINDOWS keys,application keys,toggle keys -Keyboard on mobile devices typically are smaller and/or have fewer keys MOUSE -A mouse is a pointing device that fits under the palm of your hand comfortably -A mouse can be wired or wireless -Type of mouse: trackball,touchpad,pointing stick TOUCH SCREENS AND TOUCH SENSITIVE PADS -A touch screen is a touch sensitive display device PEN INPUT
GAME CONTROLLER
Factors affect the quality of digital camera photos :RESOLUTION and NUMBER OF BITS STORED IN EACH PIXELS -Definition of Resolution: The number of horizontal and vertical pixels in a display device -Number of bits stored in each pixels: Each pixels consists of one or more bits of data.The more bits used to represent a pixel,the more colours and shades of gray that can be represented VOICE INPUT -Voice recognition =>The computer's capability of distinguish spoken words Web Cam -Type of digital video camera that enable users to capture video and still images,send e-mail message with video attachment,add live images,broadcast,make video calls. Video Conferencing A meeting between two or more geographically separated people Biometric Input -Biometric authenticates a person's identity by verifying a personal characteristic EXAMPLE: Fingerprint reader,face recognition system,hand geometry system,voice verification system,signature verification,iris recognition,retina scanners Terminals
Input Devices for Physically Challenged User
SUMMARY
-Various techniques of entering input -Several commonly used input devices -Keyboard, mouse, and other pointing devices; touch screens, pen input, other input for smart phones, game controllers, digital cameras, voice input, video input, scanners and reading devices, biometric input, and terminals.Keyboard, mouse, and other pointing devices; touch screens, pen input, other input for smart phones, game controllers, digital cameras, voice input, video input, scanners and reading devices, biometric input, and terminals -Input devices for physically challenged user 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
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 |
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