IT Fundamentals*SYSTEM STRUCTREControl Unit works on programs/data in RAMPOWER OFF ... RAM OFFBye Bye AssignmentHowever blocks of memory can be saved/read on secondary storage.

IT Fundamentals

IT Fundamentals*Types of input

IT Fundamentals

IT Fundamentals*Input/ OutputInput device is a tool used to capture information and commands

Examples include:Keyboard Point-of-sale (POS)MicrophoneMouse Pointing stickTouch pad Touch screenBar code readerOptical mark recognition (OMR)Scanner

IT Fundamentals

IT Fundamentals*Examples of Direct Entry Input Devices

Barcode Readers:

Sit-in-the-Counter type -Reads standard or customised barcodes

IT Fundamentals

IT Fundamentals*Other Input DevicesTouchPadPointing StickLight PenTrackball

- Similar to mouseJoystick-games?-Difficult to pinpoint a position

Touch screensscreen 'divided' into areasarea selected by toucheasy to usecannot have areas too smallscreens get dirty (many uses)

IT Fundamentals

IT Fundamentals*Other Input Devices a. Sensors

Pointing Devices

Mousemeasures x-y moveent plus whether button is pressed down

IT Fundamentals

IT Fundamentals*Input Devices

Most obvious = human + KEYBOARDMachines make better input devices.

DIRECT ENTRY, or SOURCE DATA AUTOMATION.Need to be: Accurate, reliable and easy to use, fastHuman and keyboard is the most used input device

IT Fundamentals

IT Fundamentals*Input Types a. Data Collection Devices:

Web Cams Video camera whose output displays on a web pageDigital Camera

IT Fundamentals

IT Fundamentals*Voice InputVoice Input

IT Fundamentals

IT Fundamentals*Examples of Direct Entry Input Devices

MICR : Used with cheques OMR : Tattslotto & TAB OCR : Scan type-written pages. Scanners

IT Fundamentals

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