1. INFORMATION & COMMUNCATIONS TECHNOLOGY …
is using a computer to process data into information so that it is useful and can be shared. Then decisions can be made.
INPUT
PROCESS
OUTPUT
STORAGE
Mr Hanson

2. Lesson Aims: Review manual input devices
Investigate further input devices
Understand some principles of effective data capture
Understand the purpose of validation
Investigate validation rules in spreadsheets

3. List all the types of manual computer input devices that you know…

4. Manual Input Devices Keyboard Mouse Touch screen Joystick
Digital camera
Scanner
Graphics tablet
Microphone
Light pen

5. Direct Input Devices – They are automated, so there are less mistakes, and they save time
Optical mark reader (OMR)
Optical character reader (OCR)
Magnetic ink character recognition (MICR)

6. Bar code
Magnetic stripe
Sensor
Data logging

7. The type of situation will dictate the most suitable method
Then you can save time
Save money
Reduce mistakes
Then your data will be accurate and complete!

8. Which is the best method?
To read car registrations for the London congestion charge zone?
To measure the overnight temperature?
To mark 1000 multi-choice exams?
To open a door?
To issue a library book?
To read passport application forms?

9. The best method for the situation will reduce the input errors.
We can use VALIDATION RULES to reduce errors.
Validation = to establish correctness.

10. So in your spreadsheet project, you can use a number of different validation rules to make sure that only valid data is entered into the cells.